World No. 1 Jannik Sinner faced a shocking defeat in the second round of the French Open, losing to Juan Manuel Cerundolo after being two sets up and 5-1 ahead. The match, held under extreme heat, raised concerns regarding the scheduling of top players in such conditions. Sinner, who struggled with cramps and dizziness, described the experience as tough to accept. The defeat has sparked discussions on whether fatigue or the oppressive temperatures contributed to his collapse, marking one of the biggest upsets in tennis history.