by Bob Stockton
Tennis has a cruel gift for timing. It waits until the moment a champion seems untouchable — until the narrative of inevitability has been written and re-written — and then it tears the whole thing down. On a sun-baked Thursday on Court Philippe-Chatrier, the sport exercised that gift with devastating precision, as world No. 56 Juan Manuel Cerundolo engineered one of the most shocking upsets in recent Grand Slam history, ending Jannik Sinner’s reign of dominance in the second round of Roland Garros 2026.
The final scoreline — 3–6, 2–6, 7–5, 6–1, 6–1 — reads like a story with a missing chapter. Because for large stretches, this was no contest at all. Sinner, the world No. 1 and the man who arrived in Paris having won every single match he played since February, was cruising. He took the first two sets with imperious authority. He led 5–1 in the third. He was one game from the third round.
Then something went wrong with his body, and then everything went wrong with his match.
The Collapse That Changed Everything
The turning point arrived without warning. Leading 5–1 in the third set and seemingly minutes from a routine victory, Sinner suddenly appeared to seize up — heavy in his legs, wincing through longer exchanges, shuffling to the back of the court to seek a sliver of shade between points. What had been a clinical demolition job became something far more human and far more alarming.
From that 5–1 position, Sinner lost 15 consecutive points. He left the court for an off-court medical timeout, returning to play but visibly unable to compete at anything close to his normal level. Cerundolo, who had barely been in the match, suddenly found himself with an opponent who couldn’t move, couldn’t push off, and couldn’t end rallies at will.
“The story of the match was Sinner’s physical struggles that struck when he was just a game from victory in the third set. From that moment, he had nothing in the tank.”
Cerundolo took the third set 7–5, then waltzed through the fourth 6–1. By the fifth, the Argentine — who had never previously advanced beyond the second round of a Grand Slam — was dictating every rally, while the world’s best player was reduced to a shadow of himself. Cerundolo won the deciding set 6–1 to complete one of the great reversals of the modern era.
A Dynasty of Dominance — Ended
To understand the magnitude of what Cerundolo achieved, you have to understand what Sinner had built in the months leading up to this afternoon. This was not a player who had stumbled into Paris on the back of a mediocre spring. This was the most dominant force in men’s tennis, in the midst of the finest sustained run of form of his career.
Sinner arrived at Roland Garros having swept all five ATP Masters 1000 titles on offer in the clay season — Monte-Carlo, Madrid, and Rome among them — and carrying a 30-match winning streak, the longest of his career. He had not lost a match since February. His clay record for the year stood at a pristine 18–0. Every metric, every number, every observable fact about his game pointed to a player in complete and utter command of his sport.
And with Carlos Alcaraz absent from the draw due to a wrist injury, Paris felt like Sinner’s tournament to lose. He was chasing his maiden Roland Garros crown — the only major that had eluded him — and with it, a place in history as only the seventh man in the Open Era to complete the Career Grand Slam.
⬛ STREAKS ENDED BY THE LOSS
ENDED
30-match winning streak — Sinner’s longest unbeaten run of his career, stretching back to February 2026, came to a halt. It was already the longest active streak on the ATP Tour.
ENDED
Perfect 2026 clay record (18–0) — Sinner had been untouchable on red dirt all year, winning every match at every clay event he entered. That immaculate record is now gone.
ENDED
Career Grand Slam pursuit — for now— Sinner had won the Australian Open (2024, 2025), the US Open (2024), and Wimbledon (2025). Roland Garros was the final piece. He will have to wait at least another year.
ENDED
Unbeaten record against players at their home Grand Slam (19–0) — Sinner’s remarkable record against host-nation players at their own majors, which had stood at a perfect 19–0, is now broken.
ENDED
Roland Garros run of 7–0 in 2026 — Sinner had won his opening match against Clément Tabur without drama, extending a perfect start at the tournament in this calendar year. The path to the final is now someone else’s to take.
ENDED
28–0 unbeaten record against French players — extended one final time in the first round against Tabur, this streak — a remarkable reflection of Sinner’s dominance over one of the deepest tennis nations — now carries an asterisk, its context forever altered by the tournament’s early end.
Cerundolo’s Moment of History
Spare a thought — no, give full credit — to Juan Manuel Cerundolo, who turned 25 this year and had spent much of his career scratching at the door of Grand Slam relevance. He failed to qualify for Roland Garros four times before earning a main-draw spot for the first time last year. His only ATP title came in Cordoba in 2021, when he was ranked 335th in the world.
He came into this match with six straight wins, none of them against a top-50 opponent. He had never beaten a player of Sinner’s calibre. He had never won a Grand Slam match beyond the second round. He was, on paper, the most unlikely giant-killer imaginable.
And yet — when the moment arrived, when Sinner’s body betrayed him and the door crept open — Cerundolo didn’t flinch. He played the last three sets with composure, aggression, and the kind of belief that cannot be manufactured under pressure. The biggest win of his career was delivered on the biggest stage, against the best player in the world.
What Comes Next
The men’s draw, which had seemed to have a predetermined shape with Sinner as its inevitable champion, now blows wide open. The question of his physical condition will loom large over the coming days — what exactly happened on that court, and will it affect his grass-court season ahead?
For Sinner himself, this is the latest cruel blow in a tournament that has developed a habit of breaking his heart. Last year, he held three championship points against Alcaraz in the final and still couldn’t convert. This year, he held five match points — effectively — by leading 5–1 in the third set against a player ranked 56th in the world. Paris has taken from him again.
The Career Grand Slam will have to wait. The redemption tour is over for 2026. But Jannik Sinner is 24 years old, has four major titles, and has spent most of this season making the rest of the tennis world look ordinary. He will be back. He will be hungry. And he will return to this city, to this red clay, to this court.
Paris, however, has a way of making even the greatest players wait a little longer than they’d like.
