PARIS — Alexander Zverev’s reign as world No. 1 lasted precisely one match. Lorenzo Musetti made sure of it.
On a stunning Wednesday afternoon at the Rolex Paris Masters, the 24-year-old Italian produced a performance of breathtaking quality to defeat the newly crowned top seed 7-6(5), 6-2 in just one hour and 40 minutes. It was Zverev’s first match since officially ascending to the No. 1 ranking on Monday, and it ended in a straight-sets defeat that he himself described as “poor”.
The scoreline only hints at the drama. Zverev led 5-2 in the first-set tie-break, two points from taking a one-set lead in his debut as the world’s best player. What followed was a collapse of startling speed. Musetti won five consecutive points—sealing the set with a huge serve out wide to Zverev’s backhand—and never looked back. The second set was a procession. Musetti broke early, broke again, and closed out the match with an ace, finishing with 29 winners to Zverev’s 25 and just 12 unforced errors to Zverev’s 21.
“It’s pretty shocking the level I was able to play in front of Sascha, who was serving really well, especially in the first set,” Musetti said afterward. “It was really close. It could have gone both ways. The key was to stay there at 5/2. I played five great points in a row”.
The Weight of the Crown
For Zverev, the defeat is a painful reality check on a season that has otherwise been the best of his career. The 29-year-old German won his first two Grand Slam titles in 2026—the French Open and the US Open—and reached the Wimbledon final, where he lost to Jannik Sinner. He became the 30th man in ATP history to hold the No. 1 ranking and the second German after Boris Becker.
But the manner of his ascent has been contentious. He took the top spot while both Sinner and Carlos Alcaraz were sidelined with long-term injuries—Sinner with a knee problem that has ended his 2026 season, Alcaraz with a wrist injury that kept him out of two majors. Zverev’s record against top-10 opponents this year is 3-9, and the reaction to his No. 1 status has clearly stung.
“I feel like I’m the only world No. 1 in tennis history that has to explain why it’s OK for me to be world No. 1, which I find quite difficult, because I think I deserve to be where I am, even though I lost today,” Zverev said. He described himself as “annoyed” by the scrutiny, adding: “I don’t think anybody had to explain themselves as much as I had to do in the last couple of days”.
The loss to Musetti will only intensify those questions. Zverev had the advantage of a fast indoor court suited to his serve and aggressive groundstrokes, yet he looked out of sorts from the moment the tie-break slipped away. The gap between his ranking and his form against elite opposition has rarely been more exposed.
Musetti’s Redemption Arc
For Musetti, the victory is the culmination of a season defined by resilience. The 24-year-old has battled injuries throughout 2026, most notably retiring while leading by two sets against Novak Djokovic in the Australian Open quarter-final—a match that could have changed his year.
Instead, he has rebuilt. He ended a four-year title drought in Lyon last month, and he arrived in Paris having won eight of his past nine tour-level matches. This was his second career victory over a World No. 1, and it was achieved with the kind of fearless, attacking tennis that has long been his trademark but has too often been undermined by physical fragility.
“I’ve been working a lot on my body, on my tennis,” Musetti said. “I’m happy that it’s paying off”.
He now faces Frenchman Luca Van Assche in the third round, a player who continued his career-best season with a 7-6(4), 6-4 win over 15th seed Learner Tien.
A Tournament of Shocks
Musetti’s upset was not the only story of the day. French wildcard Quentin Halys saved four match points to defeat seventh seed Frances Tiafoe 6-3, 1-6, 7-6(9), a result that shook up the PIF ATP Live Race to Turin and qualified Arthur Fils for the ATP Finals.
Novak Djokovic and Carlos Alcaraz were both in action later on Wednesday, with Djokovic needing to reach the semi-finals to keep his ATP Finals hopes alive. But the spotlight belonged to Musetti, and to the world No. 1 who lasted just one match at the top.
Alexander Zverev is the world No. 1.
The ranking is official, earned over a 52-week period, and no single defeat can take it away. But the loss to Musetti raises a question that will follow him through the off-season and into 2027: can he be a champion when the champions are healthy?
For Musetti, the win is a statement. He has the talent—the elegant backhand, the variety, the willingness to attack—to beat anyone on his day. The challenge has always been staying on the court. If he can, Paris may prove to be the turning point of a career that has too often promised more than it has delivered.
For Zverev, the lesson is simpler and harsher. The crown is heavy. And on this evidence, he will have to fight to keep it.
Do you think Zverev can bounce back from this defeat and prove he deserves the No. 1 ranking, or will Musetti’s win signal a shift in the men’s game?
