Carlos Alcaraz and Jannik Sinner break into 2025 ATP No. 1 club highlights | ATP Tour

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Alcaraz, Sinner among 2025 ATP No. 1 club highlights

The duo’s battle for world No. 1 has captivated fans all season long

December 12, 2025

To mark the end of another exciting season, ATPTour.com presents our annual “Best of” series, which will reflect the most interesting rivalries, games, comebacks, upsets and more. Today, we highlight some of the key moments for the ATP No. 1 club in the 2025 season.

The story of the ATP No. 1 club in 2025 revolves around just two people: Carlos Alcaraz and Jannik Sinner.

The great Lexus ATP Head2Head competitors put up a great fight throughout the season for the ATP year-end first place awarded by PIF Honors and in doing so continue to enrich the history of one of the most unique groups in the sport. ATPTour.com breaks down the 2025 storyline surrounding the two newest members of the ATP No. 1 club, Alcaraz and Sinner.

ATP No. 1 Club Profile:

Sinner debuts at No. 1 for 52 weeks
Even among the prestigious ATP No. 1 club, Sinner became part of an even more exclusive group on June 2. In the middle of Monday at Roland Garros, the Italian began his 52nd consecutive week at the top of the PIF ATP Rankings, becoming only the fifth world No.1 to reach the top spot for a year on his debut.

Sinner joins Roger Federer (237 weeks), Jimmy Connors (160 weeks), Lleyton Hewitt (75 weeks) and Novak Djokovic (53 weeks) in breaking the record of 52 consecutive weeks at No. 1 for the first time. By the time Alcaraz replaced him at the top of the table on September 8, the Italian’s reign had stretched to 65 weeks.

Since the PIF ATP Rankings were introduced in 1973, only four other members of the No. 1 club have managed to hold the top spot for consecutive years: Ivan Lendl, Pete Sampras, John McEnroe and Rafael Nadal.

Alcaraz wins winner-take-all U.S. Open showdown
On September 7, Alcaraz completed a double attack on rival Sinner in New York. The Spaniard won the championship match in four sets to take the US Open crown from 2024 titleholder Sinner and replace the Italian as world number one.

Alcaraz prevailed in the winner-take-all final, with Sinner retaining top spot with the victory, ensuring the Spaniard’s return to the top spot on September 8, the 22nd anniversary of his coach Juan Carlos Ferrero’s first ascent to world number one. Ferrero, a member of Alcaraz’s ATP-ranked club, was one of the first people the 22-year-old thanked during his speech. The trophy will be presented at Arthur Ashe Stadium.

“My team, my family, I’m really lucky to have you,” Alcaraz said. “The efforts you have made have made me a better person, not only professionally but personally as well. Every achievement I have achieved [making] Thanks to you, this one is also yours. ”

Indoor Master Sinner’s End of Season Charge
With his US Open win, Alcaraz leads Sinner by 2,590 points at the PIF ATP Live event in Turin. For most players on the tour, drastically changing such an advantage might be unthinkable, but Sinner quickly began to provide plenty of reminders that he’s still in the battle for the year-end No. 1 ranking in the ATP, which is awarded PIF honors.

The Italian bounced back quickly to claim the ATP 500 title in Beijing, and although he was subsequently forced to withdraw from his third-round match against Talon Grikspur in Shanghai, Sinner quickly sealed his place in the European indoor season, keeping his year-end No. 1 rival Alcaraz on his toes.

The 24-year-old has dropped just one set in the title race at the Vienna ATP 500 and Rolex Paris Masters, while Alcaraz showed signs of slipping up indoors in his shock first-round loss to Cameron Norrie in Paris. The defeat returned Sinner to world No. 1 a week before the Nitto ATP Finals.

Sinner celebrates winning the Paris title with his team. Photo credit: Corinne Dubreuil/ATP Tour

Alcaraz keeps his cool in Turin to claim year-end number one
A week later, after dropping points in the PIF ATP Rankings at the 2024 Nitto ATP Finals, Alcaraz returned to No. 1, setting the stage for the final battle for the year-end No. 1 spot at the 2025 Season Finals. Alcaraz needed to bounce back from his struggles in Paris to finish the year top of the table and he did just that with an impressive start to the season at the Inalpi Arena.

Alcaraz, who needed 450 points in Turin to claim ATP year-end No. 1 honors for the second time in PIF honors, beat Alex De Minaur, Taylor Fritz and Lorenzo Musetti in the group stages before finally getting rid of Sinner. Although Sinner posted a 21-1 record after the U.S. Open, Alcaraz’s consistency throughout the year ultimately proved too big a mountain for his opponents to climb, although Sinner enjoyed the final laugh of the 2025 season when he defeated Alcaraz in the Nitto ATP Finals Championship.

“It’s an honor for me [being] said Alcaraz, who is the second active member of the ATP-ranked No. 1 club after Djokovic to have multiple year-end No. 1 finishes. “Being No. 1 in the world is something I work on every day with my team. It’s a goal. But I think it’s a journey that you don’t go through alone. It’s your whole team, your family, the people closest to you who are always there to support you in your hard times and good times.”

ATP Chairman Andrea Gaudenzi and PIF Head of Corporate Branding and Strategic Consulting Mohamed Alsayyad presented Alcaraz with the ATP Year-End No. 1 Trophy from PIF. Photo credit: Corinne Dubreuil/ATP Tour