Sinner tested positive twice for an anabolic steroid during the 2024 Indian Wells Tournament. He tested positive for a substance called Clostebol, which is notably banned in tennis, and he was first popped for the steroid during Indian Wells, and then again eight days later in an out-of-competition sample.

Wimbledon winner Iga Swiatek and men's finalist Jannik Sinner both served doping suspensions and Nick Kyrgios thinks tennis has a problem due to their success in London

Following Sinner’s win Sunday over Carlos Alcaraz in the final, Kyrgios took to X with a cryptic, one-character message about Sinner’s victory: an asterisk.

Sinner failed two drug tests in 2024, which eventually saw him suspended at all tennis competitions from February 9, 2025 to May 4, 2025 following a settlement with the World Anti-Doping Agency (WADA). The 23-year-old Italian twice tested positive for clostebol – a steroid that can be used to build muscle mass.

Italian tennis star Jannik Sinner discusses his personal life and girlfriend rumors before facing Carloz Alcaraz in the 2025 Wimbledon final.

This second straight major final between the two entrenches them as world No. 1 and No. 2. It wasn't this way more recently than you think.

Sinner accepted a three-month suspension from the World Anti-Doping Agency in February after two positive doping tests in 2024. The first positive came last March, when Sinner registered a ...

Jannik Sinner’s three-month doping ban isn’t sitting right with some in the tennis world. ... Sinner’s suspension is from Feb. 9 through May 4, allowing him to return at his home tournament, ...