Jannik Sinner's quest to win his fifth career Grand Slam title at the 2025
US Open will be made a bit harder, as he will have to compete without his coach.
Until this year's Wimbledon Championships, Sinner has never managed to win a Grand Slam title outside of the hard courts. On the hard courts, however, he has dominated in the last two years, winning all majors on that surface since the start of the 2024 season.
The Italian player is a two-time Australian Open champion, winning in 2024 and 2025, and he will now attempt to complete the same double also at the US Open, where he won last year.
In 2024, it was only his second career major, and now, he can lift already his fifth, having won 20 out of 21 matches that he has played at the Grand Slam level this year. But this time, he will have to deal with some challenges on his way to the title in New York.
Last year, Sinner had to deal with questions about his doping case, this year, other things will prevent him from having an ideal preparation. The 23-year-old has already
withdrawn from the upcoming Canadian Open in Toronto, meaning he will only have one tournament to prepare for the US Open.
On top of that, it seems that Sinner will have to compete without one of his two coaches. Like some other top players, for example, Carlos Alcaraz, the Italian also has two coaches, Darren Cahill and Simone Vagnozzi.
Both of them usually accompany the four-time Grand Slam champion, but in New York, he will be without Cahill. The Italian publication
La Repubblica reported that Cahill won't travel to the United States, instead taking a short break.
This setup in New York might work as a try-out for the
ATP World No. 1's team. In 2026, Cahill shouldn't be a permanent part of Sinner's team, even though the latest reports suggest that he will remain in some capacity.
Initially, the 59-year-old Australian stated that he would end his coaching career after this season, but after his win at Wimbledon, Sinner mentioned that they have talked about that decision since, and made slight adjustments.
According to the latest available information, Cahill should be present with Sinner for the 2026 Australian Open, and the coach should remain part of the team also after that, even though only on a remote basis.
Sinner has faced many challenges in his career already, mostly related to the media pressure tied to his doping case. Every time, he showed that it didn't bother him, so there shouldn't be any worry about his performance in New York without Cahill.
According to the same report from La Repubblica, the four-time Grand Slam champion has already resumed practice in Monte Carlo. He took some time off to recover after Wimbledon, which he won with an injured right elbow.