tournament-avoider - Predictions for:

Jannik Sinner withdrew from the US Open due to a persistent right knee injury, and there are no indications that he will reverse this decision. Consequently, the probability of him winning the US Open in 2026 is 0%. His absence from the tournament is confirmed and should be factored into forecasts, making it effectively impossible for him to win given he is not participating.

As of August 26, 2026, Jannik Sinner has officially withdrawn from the US Open due to a knee injury. As a result, there is a 0% probability of him winning the US Open this year. This outcome is purely based on his confirmed absence from the tournament, leaving no possibility for him to compete and subsequently win the title.

Current Status & Fitness: Jannik Sinner's participation in the US Open hinges on achieving full fitness. While he's resumed training, his knee condition is a major concern, and any doubt about fitness could lead to withdrawal based on his camp's strict 100% fit policy.

Recent Activity: He has only played seven competitions in recent months (all at Wimbledon), indicating a lack of match readiness, which can impact performance even if he participates.

Field Composition & Competition:

• Carlos Alcaraz has been confirmed to play, which increases competition at the event and diminishes Sinner’s chances of winning, given Alcaraz's proven track record even though he's returning from injury.
• Other strong contenders like Novak Djokovic, Alexander Zverev, and others also stand as significant obstacles.

Scenarios:

• The scenario where Sinner doesn't play is reduced, yet still possible if final fitness assessments are not favorable.
• If Sinner does compete, despite his talent and ranking, his chance of winning is reduced by his lack of preparation and potential vulnerability to an intense tournament schedule.

Forecast Summary: Overall, considering his fitness, preparation, and the competitive field including a returning Alcaraz, Sinner’s probability of winning the US Open is estimated at 25%. This reflects both the uncertainty of his participatory status and the heightened competition level.

Jannik Sinner has shown strong performance throughout 2026, particularly on hard courts, winning key Masters titles and Wimbledon. However, his recent knee issues and lack of match play since Wimbledon raise concerns about his readiness to compete at his peak over a grueling Grand Slam.

Carlos Alcaraz, a potential significant competitor, is unlikely to participate or be competitive due to his ongoing rehabilitation from a wrist injury and absence from lead-up events like Cincinnati.

The field remains competitive with Djokovic and Zverev as formidable opponents, alongside emerging talents like Fritz and Shelton who could exploit any vulnerabilities.

Given these factors, Sinner's probability of winning is slightly reduced from previous estimates:

• Knee and readiness issues: Dropping his probability due to rust from lack of matches.
• Alcaraz's likely absence: Increases his chances slightly but the danger from other top players remains significant.

Taking into account updated information, the probability of Sinner winning the US Open is adjusted to 37%.

Analysis:

1. Current Health and Preparation: Sinner's withdrawal from Cincinnati due to knee inflammation raises concerns about his physical readiness. Without recent competition since Wimbledon, there's limited data on his match fitness and form.

2. Historical Performance and Ranking: Despite his current number 1 ranking and success on hard courts earlier in the season, the lack of recent play increases uncertainty about his early-round performance at the US Open.

3. Rival Considerations: With Alcaraz's participation in doubt, one potential high-level threat may be diminished. However, other capable competitors like Djokovic and Zverev remain strong threats.

4. Strategic Rest: While Sinner’s strategic rest approach could optimize his stamina for later stages, it does introduce unpredictability.

5. Match Sharpness: The absence of recent competitive play increases uncertainty regarding his performance, especially during the initial rounds.

Conclusion:

Given these considerations, including health concerns and competitive factors, the probability for Sinner winning the US Open has been adjusted to 40%, reflecting the combination of his potential for excellence and the increased risks due to recent developments.

Jannik Sinner's probability of winning the US Open in 2026 needs to be assessed through multiple lenses:

1. Current Form and Surface Aptitude: Sinner is in excellent form, having won Wimbledon and multiple Masters 1000 titles in 2026. His success on hard courts, where the US Open is played, is significant, as evidenced by his victories in Indian Wells and Miami, strengthening his case.

2. Historical Performance: Sinner has a strong track record at the US Open, with a title in 2024 and a finals appearance in 2025, indicating a history of performing well at this venue.

3. Competitive Landscape: A key challenge remains Carlos Alcaraz, a consistent rival. Despite Sinner's overall dominance, his head-to-head record against Alcaraz is poor (1–6 since early 2024), and this rivalry could be pivotal in deciding the outcome.

4. Medical Considerations: The recent medical examination raises some concern but without significant evidence of injury, it remains a minor factor.

5. Momentum and Confidence: Winning Wimbledon and being ranked No.1 suggests strong momentum, which is critical in a Grand Slam setting.

6. Risk Factors: The surprise loss at Roland Garros signifies potential vulnerabilities either physically or mentally, and the recent medical check could hint at undisclosed issues.

Given these variables, Sinner has a strong chance but not overwhelming, as challenges, primarily from rivals like Alcaraz, remain substantial. Therefore, I assign a probability of 45% for Sinner winning the US Open 2026.