Jannik Sinner's coach Darren Cahill shares glimpses of what Italian is up to in off-season

Jannik Sinner’s coach Darren Cahill has given fans a look at what the Italian has been up to during the off-season. With the tennis calendar wrapped up, players finally have time to unwind, travel, and enjoy the break, and Sinner is making the most of it, too.

Now that the season has ended, Sinner finally has some time off and has been focusing on improving his golf game. Golf is a popular hobby among many tennis players, including Carlos Alcaraz, Casper Ruud and Rafael Nadal.

Sinner’s coach Cahill shared an Instagram story showing the Italian taking a swing at a golf ball. He looked fully focused as he lined up the shot, but the result didn’t go quite as planned. As soon as he saw where the ball went, Sinner burst out laughing and even dropped to the ground in amusement.

"Off season has arrived.....@janniksin," Darren Cahill wrote in the caption.

Jannik Sinner had an outstanding 2025 season despite missing a few months because of his doping ban. When it comes to Grand Slams, he won two titles at the Australian Open and Wimbledon and reached the final at all four Majors.

Besides that, the World No. 2 also picked up four more titles in Beijing, Vienna, the Paris Masters and the ATP Finals, which was his final tournament of the year. He defeated his rival Carlos Alcaraz in straight sets in the championship match to successfully defend his title in Turin.

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Darren Cahill expected to remain part of Jannik Sinner’s coaching team in 2026

Jannik Sinner pictured with Darren Cahill at the 2025 Paris Masters | Image Source: Getty

Darren Cahill’s successful partnership with Jannik Sinner is expected to continue into 2026. The Aussie coach has played a key role in shaping the most important years of Sinner’s young career.

Although Cahill originally planned to retire at the end of 2025, he has confirmed that he will stay with Sinner for at least one more season after the two made an agreement during Wimbledon.

"My future is in Jannik’s hands," Cahill told said during a press conference in Turin. "I’m a man of my word. We had a little bet before the Wimbledon final and he gets to decide what I do next year, so it’s not really a question for me; if he wants me to stick around next year, I’ll be here for him." "The bet right before the Wimbledon final was if he won, he got to choose what I would do in 2026 regarding him. Now, I don’t know if that will last the whole year next year… he has to make sure he keeps his options open, to keep improving, to keep inspiring himself and to make sure he continues to go to the next level," he added.

Since bringing Cahill on board, Jannik Sinner has won 19 of his 24 career titles, including all four of his Grand Slams, back-to-back ATP Finals trophies in 2024 and 2025, and all five of his Masters 1000 titles. However, Sinner has not yet made an official announcement confirming Cahill’s continuation.

Edited by Pritha Ghosh