Defending Wimbledon champion Jannik Sinner is adjusting his physical preparation for the grass-court season following medical testing prompted by a mid-match collapse at the French Open. The top-ranked Italian confirmed on Wednesday that he has identified the cause of his recent physical struggles, signaling a shift in how athletes manage high-intensity performance during periods of extreme heat.
How do elite athletes manage extreme heat on court?
Professional tennis players are increasingly relying on physiological data and cooling technology to mitigate the effects of soaring temperatures. According to reports from the All England Club, Sinner utilized a cooling vest during his practice sessions in London this week to regulate his core temperature. This proactive approach contrasts with his experience in Paris last month, where he was observed using ice bags during a five-set loss on Court Philippe-Chatrier.
Why are heatwaves impacting tournament infrastructure?
Extreme weather events are forcing organizers to modify standard tournament operations to protect both players and staff. During Wednesday’s qualifying matches at Roehampton, the All England Club replaced ball boys and ball girls with adult staff as temperatures reached 33 C (91.4 F) under a red warning issued by the British national weather service. Additionally, the club reported a temporary power outage that disabled electronic line-calling systems, an issue officials are currently investigating as a potential heat-related hardware failure.

How does Sinner’s preparation compare to previous seasons?
Sinner’s current buildup marks a departure from his usual tour-level schedule. While he previously competed in lead-up grass events, he opted for an exhibition match at the Giorgio Armani Tennis Classic this year to test his physical limits in a controlled environment. His victory over Cam Norrie provides a baseline for his fitness, though it remains a significant shift from his 2023 campaign, where he reached the Wimbledon final after a more traditional tournament trajectory.
Did you know?
The British Met Office has warned that temperatures in parts of the U.K. could reach up to 40 Celsius (104 F) during the current heatwave. These conditions significantly reduce the body’s ability to recover overnight due to humid, warm evenings.
Frequently Asked Questions
What caused Sinner’s physical issues at the French Open?
Sinner stated that he underwent comprehensive medical testing following his exit from the French Open. While he did not disclose the specific clinical findings, he confirmed that he and his team have reached a “very good” conclusion regarding the cause of his dizziness and fatigue.
Will the heat affect the upcoming Wimbledon tournament?
Meteorological forecasts suggest that temperatures at Wimbledon are expected to drop to approximately 24 C (75 F) by Monday, providing a more manageable climate compared to the current extreme heat warnings in southern England.
How do tournaments handle power outages during extreme heat?
When electronic infrastructure like line-calling systems fails due to high temperatures, venues rely on contingency protocols. The All England Club confirmed that they manage such disruptions by shifting to human-led operations or manual overrides to ensure the integrity of the match remains intact.
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