World No. 1 Jannik Sinner lost to unseeded Argentine Juan Manuel Cerundolo in the second round of the French Open on Thursday [1].
The defeat marks a sudden collapse for the top seed, who entered the tournament as the dominant force in men's tennis following a historic run of form.
Cerundolo secured the victory with a final score of 3-6, 2-6, 7-5, 6-1, 6-1 [1]. Sinner initially held a commanding lead, winning the first two sets before the momentum shifted in the third. The match concluded with Cerundolo delivering a career-best performance to eliminate the favorite [2].
Environmental factors played a significant role in the outcome. Sinner struggled with dizziness during a heat wave in Paris, which contributed to his decline in performance during the final three sets [2].
The loss ended a remarkable streak for Sinner, who had won 30 straight matches leading up to this upset [2]. His recent dominance included five consecutive Masters 1000 titles [2]. Three of those titles were won on clay courts, making him a perceived favorite for the Roland Garros title [2].
The shock result resonated beyond the court, impacting the sports betting market. One bettor reportedly lost $55,000 following the unexpected exit of the world leader [3].
“Sinner struggled with dizziness during a heat wave”
Sinner's early exit disrupts the projected trajectory of the 2026 French Open and opens the draw for other contenders. The combination of extreme weather and a high-variance performance from an unseeded opponent highlights the volatility of clay-court tennis, even for a player with a dominant record on the surface.
