Which Serie A club does tennis star Sinner support?

Tennis star Jannik Sinner has become one of the most popular sportsmen in Italy, and when he’s not competing on the court, the World No.2 is known for his support for Serie A giants Milan.

Sinner has consistently dominated tennis predictions alongside Spanish star Carlos Alcaraz over the last few years, and back in September, the Italian was overtaken at the top of the World Rankings after holding the No. 1 spot for 65 weeks.

Sinner is only 24 but is already regarded as the best Italian male tennis player of all time, having won four Grand Slam tournaments: two at the Australian Open, one at Wimbledon and one at the US Open.

It goes without saying that Sinner has dominated the headlines in Italy in recent years, with his popularity close to, and sometimes surpassing, that of footballers. Something unthinkable until a few years ago for a country that breathes football day in, day out.

Before pursuing a career in tennis, the Italian was a talented skier from the age of three. Sinner is also a big football fan and has made no secret that his favourite club in Serie A is Milan.

Sinner showed his passion for the Rossoneri following a match against fellow Italian Fabio Fognini, an Inter supporter, at the Internazionali d’Italia in  May 2022. After clinching a three-set victory, Sinner famously wrote ‘Forza Milan’ on a live TV camera.

The former World No. 1 was a guest of Milan in November 2023 for a Champions League match against Borussia Dortmund at San Siro.

MILAN, ITALY – MARCH 08: The AC Milan fans show their support during the Serie A match between AC Milan and FC Internazionale at Giuseppe Meazza Stadium on March 08, 2026 in Milan, Italy. (Photo by Marco Luzzani/Getty Images)

On that Day, Milan ultras in the Curva Sud honoured the tennis champion with several chants before kick-off.

Sinner is also a close friend of Italy captain Gianluigi Donnarumma, who won the Champions League with PSG last season.

“Gigio and I have been friends for a long time,” Sinner said before last season’s Champions League Final between the Ligue 1 giants and Inter.

LONDON, ENGLAND – JULY 13: Jannik Sinner of Italy lifts the Gentlemen’s Singles Trophy on the Clubhouse Balcony, following his victory against Carlos Alcaraz of Spain during the Gentlemen’s Singles Final on day fourteen of The Championships Wimbledon 2025 at All England Lawn Tennis and Croquet Club on July 13, 2025 in London, England. (Photo by Julian Finney/Getty Images)

“We have our priorities, and he is about to play one of the most important matches of his life. Rooting for whom? I don’t want to say anything because I don’t want to put anyone in a difficult spot. I’m a Milan fan, but as an Italian, it would be nice if an Italian team won. But if it were Gigio, I’d be happy. I hope it’s a great match.”

Ultimately, Donnarumma lifted the cup with the big ears, beating Milan’s city rivals Inter 5-0 in Monaco. A few months later, the Italian captain joined Manchester City.

With Milan sitting second in the Serie A table this season, Sinner will be hoping to watch his favourite club play in the Champions League again in 2026-27.