Juan Manuel Cerundolo, ranked 56th in the world, executed a stunning upset at Roland Garros on Thursday, dispatching No. 1 Jannik Sinner in a grueling five-set match. The contest, which stretched over three hours and 36 minutes, saw Cerundolo overcome a significant deficit, ultimately winning by a score of 3-6, 2-6, 7-5, 6-1, 6-1.
The Argentine’s victory was amplified by the intense heat on Court Philippe-Chatrier, which appeared to take a considerable toll on Sinner, particularly in the latter stages of the match. Sinner, who had been leading comfortably and seemed on track for a swift victory, began showing signs of distress while up 5-1 in the third set. He later described feeling "very dizzy" and "as though he wanted to be sick."
Cerundolo demonstrated remarkable resilience, saving all eight break points he faced across the final two sets. This prevented Sinner from gaining any further momentum and forced the world No. 1 into uncomfortable positions. Sinner managed to win only one of the final thirteen games played.
Read More: Gael Monfils' Tennis Legacy: Showmanship vs. Grand Slams
The defeat marks a significant end to Sinner's impressive 30-match win streak, his longest of the season. His bid for a maiden Roland Garros title was abruptly halted in the second round. Sinner himself acknowledged the disappointment, stating, "It's tough to accept." He also extended congratulations to Cerundolo for his performance.

A Career-Defining Upset
For Juan Manuel Cerundolo, this triumph represents the most significant victory of his career. He advances to the third round of a Grand Slam for the first time. His previous career-high ranking stands at No. 54. Notably, Cerundolo previously won his first ATP title as a qualifier ranked No. 335.
A Shifting Landscape in Paris
Sinner's unexpected exit has dramatically altered the trajectory of the men's singles draw at Roland Garros, leaving the field significantly more open. The world's top-ranked player's departure creates new opportunities for other contenders.
Read More: Paris Property Market Slows: Sellers Avoid Price Cuts, Buyers Stay Flexible
Contextual Background
Roland Garros, the second Grand Slam of the year, is being played under testing weather conditions in Paris. While not explicitly detailed in the provided summaries, the article from sportsnet.ca mentions Cerundolo "takes advantage of the heat in France." The match took place on Thursday, May 28, 2026. Sinner’s previous Grand Slam campaigns have also seen him exit in five-setters in recent tournaments.