Jannik Sinner is preparing for Wimbledon after experiencing a severe heat-related collapse during the French Open last month, raising concerns about his ability to maintain dominance in extreme conditions. The Italian world No. 1 suffered a dramatic breakdown in his second-round match against Juan Manuel Cerundolo when temperatures soared to 34 degrees Celsius. Leading comfortably and close to victory, Sinner suddenly doubled over and began dry heaving between points, losing 18 of the final 20 games and ultimately the match.

With Carlos Alcaraz sidelined due to a wrist injury and Sinner riding a 30-match winning streak prior to the loss, the upset has been regarded as one of the most significant grand slam shocks in recent memory. The incident highlighted the physical challenges posed by extreme heat, a factor that had been identified as a potential obstacle for Sinner before the tournament.

In response, Sinner has undergone a series of evaluations to determine the underlying causes of his recurring difficulties with heat. Over the past two and a half weeks, he has implemented adjustments aimed at enhancing his tolerance and performance under hot conditions. At practice sessions in southwest London’s Aorangi Park, Sinner was seen wearing an ice vest, while in a controlled but indicative setting, he secured a straightforward victory over fellow British player Cameron Norrie during an exhibition match at the Hurlingham Club amid sweltering weather.

Although the two-set exhibition does not replicate the pressure and intensity of a Grand Slam encounter, Sinner conveyed cautious optimism that the issue is being addressed effectively. “Of course you cannot simulate 100 percent what you feel in a match because of tension-wise everything going around before and after the match,” he said. “We made some changes. I don’t say big changes, but I always believe in small details. We are happy with what we are doing. It’s a long process. There’s no magic behind it but we are doing as much as we can. I’m very happy with the work we did in the last two and a half weeks. Very long days. I feel well-prepared.”

As Wimbledon approaches, where temperatures are expected to be more moderate than at Roland Garros, Sinner remains among the 127 entrants aiming to end his reign. His ability to cope with heat stress will be closely watched, especially with Alcaraz still out of competition. The tournament could prove pivotal in assessing whether the adjustments Sinner has made will allow him to reclaim and sustain his position at the top of men’s tennis.