Sinner’s French Open collapse ranks among historic betting shocks
Medical attention and extreme heat contributed to Jannik Sinner’s five-set defeat by unranked Juan Manuel Cerundolo, a result that has triggered significant analysis from sports betting markets.
World number one Jannik Sinner suffered a second-round elimination at the 2026 French Open, losing to unranked Juan Manuel Cerundolo in five sets. The result, which ended a 30-match winning streak that had lasted since February 2026, has been characterised by analysts as one of the most significant upsets in sports betting history.
Sinner entered the tournament as a -275 to -300 favourite, representing the second-shortest pre-tournament odds at a Grand Slam since at least 1990. For the specific match against Cerundolo, who was listed as a 32-1 underdog, Sinner was priced at -50,000 on DraftKings. The magnitude of the defeat was underscored by the fact that Sinner held a two-set lead and a 5-1 advantage in the third set before the momentum shifted.
During the contest, medical staff attended to Sinner after he reported feeling unwell and had his blood pressure taken. Reports cited extreme heat, with temperatures recorded at 84 degrees Fahrenheit, as a contributing factor to his collapse. Sinner lost 18 of the final 20 games in the match, which concluded with a scoreline of 3-6, 2-6, 7-5, 6-1, 6-1.
The outcome marks the first time a men’s number one seed has exited the French Open in the second round or earlier since Andre Agassi in 2000. At one point during the third set, Sinner’s odds lengthened to 100-1 at various sportsbooks, reflecting the dramatic turn in the match.
The financial implications of the result were immediate. A bettor who wagered $50,000 on Sinner at 98% on the prediction market Kalshi, a potential return of $949.07, received nothing. The event has been compared to other historic shocks, including Stephen F. Austin’s victory over Duke in 2019 and Rich Strike’s win in the 2022 Kentucky Derby, both of which featured long-shot underdogs.
