French Open Drama: World No. 1 Jannik Sinner Collapses in Second Round After Heat-Stricken Meltdown

The 2026 French Open has already delivered one of its most shocking moments in years, as world No. 1 Jannik Sinner suffered a dramatic second-round collapse against unseeded Argentine Juan Manuel Cerúndolo. The Italian star, who entered the match as the overwhelming favorite and was serving for victory at 5-1 in the third set, unraveled completely in the Parisian heat, losing 18 of his final 20 games in a 6-3, 6-2, 5-7, 6-1, 6-1 defeat.

Sinner’s stunning exit—his first loss after 30 consecutive wins—has sent shockwaves through Roland Garros and dramatically reshaped the tournament’s title race. With both Sinner and Carlos Alcaraz now eliminated, the door has swung wide open for Alexander Zverev, who advanced to the third round with a straight-sets victory over Tomáš Macháč.

How Sinner’s Dominance Turned to Dust in 90 Minutes

Sinner began the match exactly as expected, dismantling Cerúndolo with his signature aggressive baseline game. The world No. 1 won the first two sets 6-3 and 6-2, showcasing the same firepower that has made him the most dominant player on tour since winning his first Grand Slam title at the 2024 Australian Open.

But the third set became a nightmare. With a 5-1 lead and serving for the match, Sinner suddenly began struggling with cramping in his legs and severe dizziness. He lost 15 of the next 16 points, collapsing to a 5-7 defeat in the third set. The physical toll was evident as he left the court for medical attention, returning only to lose the final two sets without contest.

Sinner’s Body Betrayed Him: The Medical Battle on Court Philippe Chatrier

In a post-match press conference, Sinner revealed the extent of his physical struggles:

Medical sources confirmed Sinner experienced severe cramping in his left leg, dehydration, and symptoms consistent with heat exhaustion. Despite the 90-degree (32°C) conditions on Court Philippe Chatrier, Sinner insisted the heat wasn’t the primary factor—though former champion Boris Becker had warned before the match that “the weather is his greatest opponent.”

Cerúndolo, who entered the match unseeded at No. 56 in the world, was visibly moved by Sinner’s collapse:

Cerúndolo’s Masterclass: How the Underdog Capitalized on Sinner’s Collapse

While Sinner’s physical breakdown was the primary factor, Cerúndolo executed a tactical masterclass to exploit his opponent’s vulnerabilities. The Argentine:

• Extended rallies: Played with high-risk topspin to force Sinner into longer points, knowing his stamina was compromised.
• Targeted Sinner’s backhand: Directed more serves and groundstrokes to Sinner’s weaker side as his movement deteriorated.
• Patience at the net: Unlike Sinner, who often finished points at the net, Cerúndolo played conservatively at the baseline when needed.
• Mental resilience: Maintained composure despite serving for the match in the fourth set, a moment many players would have cracked under.

Ex-professional Philipp Kohlschreiber, who witnessed Sinner’s struggles firsthand, called it one of the most heartbreaking collapses he’s ever seen:

French Open Title Race Wide Open as Sinner’s Exit Clears Path for Zverev

With Sinner eliminated and Carlos Alcaraz also out (due to a wrist injury), the French Open suddenly lacks its two biggest stars. The tournament now belongs to:

Ex-Bundesliga coach Barbara Rittner called Zverev “the absolute top favorite” after Sinner’s exit:

However, Kohlschreiber cautioned against overestimating Zverev’s chances:

Sinner’s French Open Struggles: A Pattern of Early Exits in Paris?

This isn’t the first time Sinner has struggled in the second round at Roland Garros. In 2023, he also exited in the second round—then against Daniel Altmaier—after leading 2-0 in sets. The Italian has never advanced beyond the quarterfinals at the French Open, despite winning three other majors (Australian Open 2024, 2025; Wimbledon 2025; US Open 2024).

His inability to conquer Paris contrasts sharply with his dominance on other surfaces. Sinner has now won 29 ATP Tour titles, including 10 Masters 1000 events, and remains the youngest player to complete the Career Golden Masters (winning all nine Masters 1000 events). Yet, the French Open has proven his one true nemesis.

Next Steps: Zverev’s Path and Sinner’s Recovery

Alexander Zverev’s Next Match: The German will face Lorenzo Musetti in the third round. The match is scheduled for May 29, 2026, at 14:00 UTC (16:00 CEST) on Court 1. Zverev will need to maintain his aggressive baseline game while navigating Musetti’s crafty clay-court movement.

Jannik Sinner’s Recovery: Sinner’s team has not yet confirmed his participation in the Italian Open later this month, but sources suggest he will prioritize recovery. The next ATP tournament after Roland Garros is the ATP rankings update on June 2, 2026, where Sinner’s dramatic exit will likely see him drop to No. 2 behind Zverev.

5 Key Takeaways from Sinner’s Shocking Exit

1. Heat and Humidity: While Sinner downplayed the weather’s impact, the 32°C (90°F) conditions on Court Philippe Chatrier clearly exacerbated his physical issues.
2. Mental Resilience: Cerúndolo’s ability to stay composed after serving for the match in the fourth set was the difference in this upset.
3. Title Race Shift: Zverev is now the clear favorite, but the tournament remains wide open with no other player dominating like Sinner or Alcaraz.
4. Sinner’s Vulnerability: His first loss after 30 wins in a row highlights how even the best players can be undone by physical breakdowns.
5. Cerúndolo’s Breakthrough: The Argentine’s victory marks his deepest Grand Slam run ever and could propel him into the top 30 in the world.