# Arnaldi vs Halys

Arnaldi vs Halys (Jun 29)

Updated: June 30, 2026

Category: Sports

Tags: Tennis

HTML: /markets/sports/tennis/arnaldi-vs-halys/

## Short Answer

**Key takeaway.** Both the **model** and the **market** overwhelmingly agree that Quentin Halys will win the Arnaldi vs Halys: Round Of 128 match, with only minor residual uncertainty.

## Key Claims (January 2026)

**- - Quentin Halys likely wins; Arnaldi's viral illness affected Wimbledon preparation.** - Quentin Halys also benefits from a superior career grass-court record.
- Matteo Arnaldi's low **probability** reflects his illness and poor grass form.

### Why This Matters (GEO)

- AI agents extract claims, not arguments.
- Improves citation probability in summaries and answer cards.
- Enables fact stitching across multiple sources.

## Executive Verdict

**Key takeaway.** Halys's 1c **market** price (**1.0%**) exceeds the **0.7%** **model** estimate (-0.3pp gap), driven by Arnaldi's illness and grass record.

### Who Wins and Why

| Outcome | Market | Model | Why |
| --- | --- | --- | --- |
| Outcome | 1.0% | 0.7% | Market higher by 0.3pp |

## Model vs Market

- Model Probability: 0.7% (Yes)
- Market Probability: 1.0% (Yes)
- Yes refers to: Yes
- Edge: -0.3pp
- Expected Return: -27.2%
- R-Score: -0.04
- Total Volume: $1,835,853.54
- 24h Volume: $1,824,473.24
- Open Interest: $1,035,019.81

- Expiration: July 13, 2026

## Market Behavior & Price Dynamics

This market, pricing the probability of a Matteo Arnaldi victory, has been extremely volatile. After opening near zero at 6.0%, the contract experienced a sharp, unexplained rally to 49.0% on June 26. This move is anomalous, as it occurred the day after Arnaldi's opponent, Quentin Halys, was defeated in a quarterfinal match. The market then reversed course on June 30, the day of the match, collapsing 22 percentage points to settle at 21.0%. The primary driver for this price drop appears to be news of Arnaldi's withdrawal from the Roland Garros semifinal on June 5 due to a severe viral illness, a health concern traders likely priced in as the Wimbledon match neared.

Trading volume confirms that market conviction formed late and decisively. Total volume reached 990,642 contracts, but the majority of this activity, over 658,000 contracts, occurred on June 30. This heavy volume accompanied the sharp price decline, suggesting strong consensus behind the negative re-rating of Arnaldi's chances. The price action indicates that early market sentiment was thin and inefficient, but information regarding Arnaldi's health eventually catalyzed a high-conviction sell-off. The final price of 21.0% reflects significant doubt about his fitness to compete.

## Significant Price Movements

### Outcome: Matteo Arnaldi

#### 📉 June 30, 2026: 22.0pp drop

Price decreased from 43.0% to 21.0%

**What happened:** The primary driver for a significant decline in Matteo Arnaldi's prediction market price would likely be his withdrawal from the Roland Garros semifinal on June 5, 2026, due to a severe viral illness [[^]](https://www.rolandgarros.com/en-us/article/2026-edition-arnaldi-illness-sends-cobolli-through-to-first-slam-final). This health concern, occurring shortly before the Wimbledon match on June 30, 2026, would naturally diminish market confidence in his performance [[^]](https://www.sofascore.com/tennis/match/matteo-arnaldi-quentin-halys/YpLsNPuc). However, the available research explicitly states there is no widely reported specific news catalyst or social media activity directly linked to a 22.0 percentage point drop for his match against Halys [[^]](https://www.rolandgarros.com/en-us/article/2026-edition-arnaldi-illness-sends-cobolli-through-to-first-slam-final). Therefore, while Arnaldi's illness is the most probable influencing factor, social media was irrelevant as a primary driver.

### Outcome: Quentin Halys

#### 📈 June 26, 2026: 47.0pp spike

Price increased from 6.0% to 53.0%

**What happened:** The available web research does not identify a primary driver for the 47.0 percentage point spike in Quentin Halys' favor on June 26, 2026. Notably, Halys had just been defeated by Ugo Humbert in the quarterfinals of the Lexus Eastbourne Open on June 25, 2026 [[^]](https://www.tennis.com/tournaments/lexus-eastbourne-open/matches/u-humbert-vs-q-halys-2026-06-25), an outcome that would typically lead to a decrease in his market odds for upcoming matches. No social media activity from key figures, breaking news from major outlets, or specific market structure factors are evident in the provided sources to explain this contradictory movement. Therefore, social media was not a primary driver based on the provided information.

## Contract Snapshot

The market resolves to Yes if Quentin Halys wins the Arnaldi vs Halys professional tennis match in the 2026 Wimbledon Men Singles Round Of 128 after a ball has been played. It resolves to No if Quentin Halys does not win, including if he withdraws or forfeits after the match has begun. The market opened on June 26, 2026, and closes after the outcome or by July 13, 2026, with a projected payout one minute after closing. Special settlement conditions state that if the match does not begin (no ball played), the market resolves to a fair price, and if postponed or delayed, it remains open for up to two weeks after the rescheduled match.

## Market Discussion

Prediction markets and sports models generally favored Quentin Halys in the 2026 Wimbledon Round of 128 match against Matteo Arnaldi, with win probabilities typically between 52% and 57% [[^]](https://polymarket.com/sports/atp/atp-arnaldi-halys-2026-06-29). Expert commentary, while acknowledging Arnaldi’s recent strong performance at the French Open, often pointed to his lack of grass-court experience and Halys’s aggressive, serve-dominant game as reasons to favor the Frenchman, highlighting the tactical need for Arnaldi to extend rallies [[^]](https://lastwordonsports.com/tennis/2026/06/29/wimbledon-day-2-predictions-arnaldi-halys/).

## How do Matteo Arnaldi's and Quentin Halys's career statistics on grass courts compare ahead of their 2026 Wimbledon match?

Matteo Arnaldi ATP Grass Record | 1-5 (16.7%) [[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=208286%2FMatteo-Arnaldi) |
Quentin Halys ATP Grass Record | 8-10 (44.4%) [[^]](https://stats.tennismylife.org/players/quentin-halys/grass)[[^]](https://www.tennisratio.com/players/QuentinHalys.html) |
Quentin Halys Grand Slam Grass Record | 5-4 [[^]](https://stats.tennismylife.org/players/quentin-halys/grass)[[^]](https://www.tennisratio.com/players/QuentinHalys.html) |

**Halys boasts a significantly better career grass-court record than Arnaldi**

Halys boasts a significantly better career grass-court record than Arnaldi. Matteo Arnaldi holds a career ATP-level grass-court record of 1–5 (**16.7%**), which includes an 0–3 record specifically in Grand Slam matches on this surface, all of which occurred at Wimbledon [[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=**208286%**2FMatteo-Arnaldi). In comparison, Quentin Halys possesses a more competitive career ATP-level grass-court record of 8–10 (**44.4%**) [[^]](https://stats.tennismylife.org/players/quentin-halys/grass)[[^]](https://www.tennisratio.com/players/QuentinHalys.html). Halys's Grand Slam performance on grass courts is also notably stronger, maintaining a winning record of 5–4 [[^]](https://stats.tennismylife.org/players/quentin-halys/grass)[[^]](https://www.tennisratio.com/players/QuentinHalys.html).

The upcoming Wimbledon match features players with disparate rankings. Matteo Arnaldi, currently ranked 35th, is scheduled to play against Quentin Halys, ranked 95th, in their first-round match at the 2026 Wimbledon Championships on June 30, 2026 [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.sofascore.com/tennis/match/matteo-arnaldi-quentin-halys/YpLsNPuc).

## What is the data-driven case for Matteo Arnaldi to upset Quentin Halys, considering his recent tournament performance?

Arnaldi ATP Ranking | No. 35 [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.atptour.com/en/news/arnaldi-roland-garros-2026-grand-slam-qf-history)[[^]](https://www.tennismajors.com/roland-garros-news/i-cant-move-i-cant-eat-i-cant-drink-the-morning-matteo-arnaldis-first-slam-semi-final-disappeared-852583.html)[[^]](https://www.rolandgarros.com/en-us/article/2026-edition-the-resurrection-of-matteo-arnaldi)[[^]](https://www.tennis.com/news/articles/matteo-arnaldi-advances-to-semifinals-of-roland-garros-after-matteo-berrettini-retires-injured) |
Halys ATP Ranking | No. 95 [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=111460%2FQuentin-Halys)[[^]](https://karlobag.eu/en/sports/quentin-halys-beats-giles-hussey-to-reach-atp-lexus-eastbourne-open-quarterfinal-rhjlm/)[[^]](https://www.tennis.com/tournaments/lexus-eastbourne-open/matches/u-humbert-vs-q-halys-2026-06-25) |
Halys Win Probability | 57% [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=111460%2FQuentin-Halys)[[^]](https://karlobag.eu/en/sports/quentin-halys-beats-giles-hussey-to-reach-atp-lexus-eastbourne-open-quarterfinal-rhjlm/)[[^]](https://www.tennis.com/tournaments/lexus-eastbourne-open/matches/u-humbert-vs-q-halys-2026-06-25) |

**Matteo Arnaldi presents a data-driven case for an upset against Quentin Halys**

Matteo Arnaldi presents a data-driven case for an upset against Quentin Halys. Arnaldi holds a significantly higher ATP ranking at No. 35, compared to Halys's No. 95 [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.atptour.com/en/news/arnaldi-roland-garros-2026-grand-slam-qf-history)[[^]](https://www.tennismajors.com/roland-garros-news/i-cant-move-i-cant-eat-i-cant-drink-the-morning-matteo-arnaldis-first-slam-semi-final-disappeared-852583.html)[[^]](https://www.rolandgarros.com/en-us/article/2026-edition-the-resurrection-of-matteo-arnaldi)[[^]](https://www.tennis.com/news/articles/matteo-arnaldi-advances-to-semifinals-of-roland-garros-after-matteo-berrettini-retires-injured). His recent tournament performance includes a career-best run to the semifinals of the 2026 Roland Garros, where he demonstrated a high level of play [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.atptour.com/en/news/arnaldi-roland-garros-2026-grand-slam-qf-history)[[^]](https://www.tennismajors.com/roland-garros-news/i-cant-move-i-cant-eat-i-cant-drink-the-morning-matteo-arnaldis-first-slam-semi-final-disappeared-852583.html)[[^]](https://www.rolandgarros.com/en-us/article/2026-edition-the-resurrection-of-matteo-arnaldi)[[^]](https://www.tennis.com/news/articles/matteo-arnaldi-advances-to-semifinals-of-roland-garros-after-matteo-berrettini-retires-injured). This demanding Grand Slam journey featured record-breaking time on-court and several high-intensity matches, showcasing his capability in arduous conditions [[^]](https://www.atptour.com/en/news/arnaldi-roland-garros-2026-grand-slam-qf-history).

Arnaldi has also shown recent adaptability to grass courts, securing a win against Toby Samuel (3-6, 6-4, 6-4) in Eastbourne in June 2026 [[^]](https://www.tennisabstract.com/cgi-bin/player-classic.cgi?p=MatteoArnaldi). While pre-match projections currently favor Halys with a **57%** **probability** of winning, Arnaldi's superior ranking and impressive Grand Slam performance offer a compelling argument for an upset [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=**111460%**2FQuentin-Halys)[[^]](https://karlobag.eu/en/sports/quentin-halys-beats-giles-hussey-to-reach-atp-lexus-eastbourne-open-quarterfinal-rhjlm/)[[^]](https://www.tennis.com/tournaments/lexus-eastbourne-open/matches/u-humbert-vs-q-halys-2026-06-25). It is important to note that Arnaldi withdrew from the Roland Garros semifinals due to a virus, a factor that could potentially influence his upcoming performance [[^]](https://www.tennismajors.com/roland-garros-news/i-cant-move-i-cant-eat-i-cant-drink-the-morning-matteo-arnaldis-first-slam-semi-final-disappeared-852583.html).

## What external factors, such as injury reports or weather conditions, could significantly alter the match dynamics on June 30?

Match Event | 1st round fixture at 2026 Wimbledon Championships [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/) |
Match Date | June 30, 2026 [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/) |
Player Status | No significant injuries or fitness issues reported [[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/) |

**No significant external factors are currently reported for the Wimbledon match**

No significant external factors are currently reported for the Wimbledon match. The tennis match between Matteo Arnaldi and Quentin Halys is scheduled for June 30, 2026, as a first-round fixture at the 2026 Wimbledon Championships [[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/). As of current reports, there are no specific injury concerns or extreme weather conditions that are expected to significantly impact the match dynamics [[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/).

Recent tournament losses haven't resulted in reported fitness issues for either player. Both Arnaldi and Halys are entering Wimbledon following recent defeats at the Eastbourne tournament. Arnaldi was defeated by Hussey on June 23, while Halys lost to Humbert on June 25 [[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/). Despite these recent results, neither player has reported any lingering fitness issues that would affect their performance in the upcoming Wimbledon match [[^]](https://tennistonic.com/tennis-news/1019520/h2h-prediction-of-matteo-arnaldi-vs-quentin-halys-in-wimbledon-with-odds-preview-pick-30th-june-2026/).

## What does the complete head-to-head (H2H) match history between Arnaldi and Halys reveal about their previous encounters?

Head-to-head record | Quentin Halys leads 1-0 [[^]](https://tennis-db.com/rivalries/quentin-halys-vs-matteo-arnaldi?player1_id=91&player2_id=61)[[^]](https://tennistonic.com/head-to-head-compare/Matteo-Arnaldi-Vs-Quentin-Halys/)[[^]](https://www.tennisratio.com/h2h-compare/matteo-arnaldi-vs-quentin-halys.html)[[^]](https://atrtennis.com/page.php?first_player_name=Matteo+Arnaldi&page=h2h_single_atp_ios&second_player_name=Quentin+Halys)[[^]](https://www.atptour.com/en/scores/stats-centre/archive/2026/425/qs025) |
Total matches played | 1 [[^]](https://www.atptour.com/en/scores/stats-centre/archive/2026/425/qs025) |
Date of sole encounter | April 11, 2026 [[^]](https://tennis-db.com/rivalries/quentin-halys-vs-matteo-arnaldi?player1_id=91&player2_id=61)[[^]](https://tennistonic.com/head-to-head-compare/Matteo-Arnaldi-Vs-Quentin-Halys/)[[^]](https://www.tennisratio.com/h2h-compare/matteo-arnaldi-vs-quentin-halys.html)[[^]](https://atrtennis.com/page.php?first_player_name=Matteo+Arnaldi&page=h2h_single_atp_ios&second_player_name=Quentin+Halys) |

**Quentin Halys currently holds a 1-0 head-to-head advantage over Matteo Arnaldi**

Quentin Halys currently holds a 1-0 head-to-head advantage over Matteo Arnaldi. This record reflects a single professional match played between the two competitors [[^]](https://tennis-db.com/rivalries/quentin-halys-vs-matteo-arnaldi?player1_id=91&player2_id=61)[[^]](https://tennistonic.com/head-to-head-compare/Matteo-Arnaldi-Vs-Quentin-Halys/)[[^]](https://www.tennisratio.com/h2h-compare/matteo-arnaldi-vs-quentin-halys.html)[[^]](https://atrtennis.com/page.php?first_player_name=Matteo+Arnaldi&page=h2h_single_atp_ios&second_player_name=Quentin+Halys)[[^]](https://www.atptour.com/en/scores/stats-centre/archive/2026/425/qs025).

Their only encounter occurred on clay at the 2026 Barcelona Open. This sole match took place on April 11, 2026, as part of the Barcelona Open Banc Sabadell [[^]](https://tennis-db.com/rivalries/quentin-halys-vs-matteo-arnaldi?player1_id=91&player2_id=61)[[^]](https://tennistonic.com/head-to-head-compare/Matteo-Arnaldi-Vs-Quentin-Halys/)[[^]](https://www.tennisratio.com/h2h-compare/matteo-arnaldi-vs-quentin-halys.html)[[^]](https://atrtennis.com/page.php?first_player_name=Matteo+Arnaldi&page=h2h_single_atp_ios&second_player_name=Quentin+Halys)[[^]](https://www.atptour.com/en/scores/stats-centre/archive/2026/425/qs025). In this encounter, Quentin Halys defeated Matteo Arnaldi with a score of 6-1, 6-7(1), 7-6(2) [[^]](https://tennis-db.com/rivalries/quentin-halys-vs-matteo-arnaldi?player1_id=91&player2_id=61)[[^]](https://tennistonic.com/head-to-head-compare/Matteo-Arnaldi-Vs-Quentin-Halys/)[[^]](https://www.tennisratio.com/h2h-compare/matteo-arnaldi-vs-quentin-halys.html)[[^]](https://atrtennis.com/page.php?first_player_name=Matteo+Arnaldi&page=h2h_single_atp_ios&second_player_name=Quentin+Halys)[[^]](https://www.atptour.com/en/scores/stats-centre/archive/2026/425/qs025).

## How does the recent tournament form of Arnaldi in 2026 compare to that of Halys leading into Wimbledon?

Arnaldi Roland Garros result | Quarterfinal (June 2026) [[^]](https://tennis-db.com/players/61/matteo-arnaldi/matches)[[^]](https://stats.tennismylife.org/players/matteo-arnaldi/season/2026)[[^]](https://www.tennislive.net/atp/matteo-arnaldi/swf/?y=2026)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=208286%2FMatteo-Arnaldi) |
Halys Eastbourne result | Quarterfinal [[^]](https://stats.tennismylife.org/players/quentin-halys/season/2026)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=111460%2FQuentin-Halys)[[^]](https://www.tennislive.net/atp/quentin-halys/?y=2026)[[^]](https://tennis-db.com/matches/4430969/sho-shimabukuro-vs-quentin-halys) |
Arnaldi vs Halys match date | June 30, 2026 [[^]](https://www.sofascore.com/tennis/match/matteo-arnaldi-quentin-halys/YpLsNPuc)[[^]](https://www.royalscore.com/tennis/match/Matteo-Arnaldi-vs-Quentin-Halys/30-06-2026/2819748)[[^]](https://www.flashscore.in/match/tennis/arnaldi-matteo-hlVLAfZK/halys-quentin-EDve8Ljh/)[[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30) |

**Matteo Arnaldi showcased strong clay-court form, but had limited grass preparation**

Matteo Arnaldi showcased strong clay-court form, but had limited grass preparation. He notably reached the quarterfinal at Roland Garros in June 2026 [[^]](https://tennis-db.com/players/61/matteo-arnaldi/matches)[[^]](https://stats.tennismylife.org/players/matteo-arnaldi/season/2026)[[^]](https://www.tennislive.net/atp/matteo-arnaldi/swf/?y=2026)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=**208286%**2FMatteo-Arnaldi). His transition to grass was brief, consisting only of two qualifying victories at the Eastbourne International before Wimbledon [[^]](https://tennis-db.com/players/61/matteo-arnaldi/matches)[[^]](https://stats.tennismylife.org/players/matteo-arnaldi/season/2026)[[^]](https://www.tennislive.net/atp/matteo-arnaldi/swf/?y=2026)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=**208286%**2FMatteo-Arnaldi).

Quentin Halys experienced mixed results in his lead-up, struggling with consistency on grass. His preparation included a quarterfinal appearance at the Eastbourne International, where he defeated Giles Hussey before losing to Ugo Humbert [[^]](https://stats.tennismylife.org/players/quentin-halys/season/2026)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=**111460%**2FQuentin-Halys)[[^]](https://www.tennislive.net/atp/quentin-halys/?y=2026)[[^]](https://tennis-db.com/matches/4430969/sho-shimabukuro-vs-quentin-halys). Earlier in the season, Halys faced a second-round exit at Roland Garros and found it challenging to maintain consistent performance in other grass tournaments [[^]](https://stats.tennismylife.org/players/quentin-halys/season/2026)[[^]](https://www.tennisabstract.com/cgi-bin/player.cgi?p=**111460%**2FQuentin-Halys)[[^]](https://www.tennislive.net/atp/quentin-halys/?y=2026)[[^]](https://tennis-db.com/matches/4430969/sho-shimabukuro-vs-quentin-halys).

The two players were scheduled for a first-round Wimbledon clash on June 30, 2026 [[^]](https://www.sofascore.com/tennis/match/matteo-arnaldi-quentin-halys/YpLsNPuc)[[^]](https://www.royalscore.com/tennis/match/Matteo-Arnaldi-vs-Quentin-Halys/30-06-2026/2819748)[[^]](https://www.flashscore.in/match/tennis/arnaldi-matteo-hlVLAfZK/halys-quentin-EDve8Ljh/)[[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30).

## What Could Change the Odds

**The match between Matteo Arnaldi and Quentin Halys, part of the Wimbledon tournament's first round, took place on June 30, 2026, not on July 13, 2026 [[^]](https://www.sofascore.com/tennis/match/matteo-arnaldi-quentin-halys/YpLsNPuc)[[^]](https://www.tennis.com/tournaments/wimbledon/matches/m-arnaldi-vs-q-halys-2026-06-30)[[^]](https://www.flashscore.in/match/tennis/arnaldi-matteo-hlVLAfZK/halys-quentin-EDve8Ljh/)[[^]](https://www.hbomax.com/cz/en/sports/2026-6-30/1125bcc7-5d9e-5d61-a7eb-dbee23755584)[[^]](https://polymarket.com/sports/atp/atp-arnaldi-halys-2026-06-29).** July 13, 2026, instead marks the commencement of several ATP 250 tournaments, including the Nordea Open in Båstad and the EFG Swiss Open in Gstaad, alongside the WTA Athens Open [[^]](https://www.atptour.com/-/media/files/calendar-pdfs/2025/2026-atp-tour-calendar-december-2025.pdf)[[^]](https://www.espn.com/tennis/schedule)[[^]](https://www.tennischannel.com/en-us/tournaments)[[^]](https://www.wtatennis.com/tournaments/1175/athens/2026). No match between Arnaldi and Halys is scheduled for July 13, 2026 [[^]](https://www.atptour.com/en/tournaments)[[^]](https://www.atptour.com/-/media/files/calendar-pdfs/2025/2026-atp-tour-calendar-december-2025.pdf).

**Grand Slam prediction markets typically react to key catalysts such as draw announcements, news of player withdrawals, and performance in early rounds [[^]](https://predictionauthority.com/sports/wimbledon-2026-prediction-markets-alcaraz-withdrawal-rybakina/)[[^]](https://news.kalshi.com/p/djokovic-vs-wu-odds-wimbledon-first-round)[[^]](https://polymarket.com/event/2026-mens-wimbledon-winner)[[^]](https://predictioncircle.com/event/2026-mens-wimbledon-winner).** **Market** volatility sees its peak between the draw release and the initial week of play [[^]](https://predictionauthority.com/sports/wimbledon-2026-prediction-markets-alcaraz-withdrawal-rybakina/)[[^]](https://news.kalshi.com/p/djokovic-vs-wu-odds-wimbledon-first-round)[[^]](https://polymarket.com/event/2026-mens-wimbledon-winner)[[^]](https://predictioncircle.com/event/2026-mens-wimbledon-winner).

## Key Dates & Catalysts

- **Expiration:** July 13, 2026
- **Closes:** July 13, 2026

## Decision-Flipping Events

- The match between Matteo Arnaldi and Quentin Halys, part of the Wimbledon tournament's first round, took place on June 30, 2026, not on July 13, 2026 [^] [^] [^] [^] [^] .
- July 13, 2026, instead marks the commencement of several ATP 250 tournaments, including the Nordea Open in Båstad and the EFG Swiss Open in Gstaad, alongside the WTA Athens Open [^] [^] [^] [^] .
- No match between Arnaldi and Halys is scheduled for July 13, 2026 [^] [^] .
- Grand Slam prediction markets typically react to key catalysts such as draw announcements, news of player withdrawals, and performance in early rounds [^] [^] [^] [^] .

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## Historical Resolutions

**Historical Resolutions:** 20 markets in this series

**Outcomes:** 10 resolved YES, 10 resolved NO

**Recent resolutions:**

- KXATPMATCH-26JUN30FRILAJ-LAJ: NO (Jun 30, 2026)
- KXATPMATCH-26JUN30FRILAJ-FRI: YES (Jun 30, 2026)
- KXATPMATCH-26JUN30LLASVA-SVA: YES (Jun 30, 2026)
- KXATPMATCH-26JUN30LLASVA-LLA: NO (Jun 30, 2026)
- KXATPMATCH-26JUN29VUKBRO-VUK: NO (Jun 29, 2026)

## Disclaimer

This content is for informational and educational purposes only and does not constitute financial, investment, legal, or trading advice.
Prediction markets involve risk of loss. Past performance does not guarantee future results.
We are not affiliated with Kalshi or any prediction market platform. Market data may be delayed or incomplete.

### Data Sources & Model Transparency

**Data Sources:** Octagon Deep Research aggregates information from multiple sources including news, filings, and market data.

**Freshness:** Analysis is generated periodically and may not reflect the latest developments. Verify critical information from primary sources.

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