Jannik Sinner suffered the biggest upset of this year's French Open, retiring from a winning position before losing a five-set second-round match to Argentina's Juan Manuel Cerundolo in stifling Paris heat. Cerundolo came from two sets down to prevail 3-6, 2-6, 7-5, 6-1, 6-1.
World number one Sinner entered Roland Garros as the overwhelming favourite, bidding to complete a career Grand Slam and extend a 30-match winning streak that included five consecutive Masters 1000 titles. Expectations were heightened further by the absence of defending champion Carlos Alcaraz and with Novak Djokovic in the later stages of his career.
Sinner dominated the opening stages, racing to a two-set lead and moving 5-1 up in the third. But the match turned dramatically when the 24-year-old began to show clear physical distress. He slowed visibly, his groundstrokes lost power and he began walking gingerly between points. At 5-4 while serving for the match, Sinner doubled over and summoned the trainer, reporting dizziness and nausea and taking an off-court medical timeout.
Though he returned to the court and took lengthy breaks between sets, Sinner never regained his earlier form. Cerundolo seized the
