French Open Shock: World No. 1 Jannik Sinner Stunned by Juan Manuel Cerúndolo in Historic Roland-Garros Upset

The 2026 French Open witnessed one of the most astonishing collapses and greatest upsets in modern tennis history on Thursday. World No. 1 and runaway tournament favorite Jannik Sinner crashed out in the second round, blown away by Argentina’s world No. 56, Juan Manuel Cerúndolo, in a grueling five-set thriller on Court Philippe-Chatrier.

​Sinner, who entered the match riding a spectacular 30-game winning streak and looking virtually untouchable, appeared to have one foot in the third round before a combination of sweltering Parisian heat and severe physical cramping completely derailed his campaign.

​Cerúndolo staged the ultimate comeback, escaping the brink of defeat to secure a historic 3-6, 2-6, 7-5, 6-1, 6-1 victory in three hours and 36 minutes

"No One is a Robot"
​A heavily fatigued Sinner did not hide his physical struggles in the post-match press conference:
​"I felt this morning I didn't sleep very well. The third set I let go to recover physically, and the fifth set we all know everything can happen, but yeah, it was tough. I was in a tough spot in the fourth and also in the fifth at some point. I didn't have energy, really. No one is a robot."

​For Cerúndolo, the victory marks his first-time ever reaching the third round of a Grand Slam major. Adding to the fairytale, it was a double celebration for the family, as his older brother Francisco Cerúndolo also advanced to the third round earlier in the day.
​With defending champions and top rivals like Carlos Alcaraz out of the tournament due to injury, Sinner’s shocking early exit blows the 2026 Roland-Garros men’s singles draw completely wide open.