Jannik Sinner was suspended for three months after he tested positive twice for clostebol, a banned anabolic steroid, in March 2024. The suspension came after a resolution agreement with the World Anti-Doping Agency (WADA), following an appeal of an initial ruling that had found Sinner bore "no fault or negligence." The positive tests were linked to unintentional contamination from his physiotherapist, who had applied an over-the-counter spray containing clostebol to Sinner's injured hand. WADA recognized that Sinner did not intend to cheat and that the substance did not enhance his performance, but held him responsible for the negligence of his support team. The suspension lasted from February 9 to May 4, 2025, during which he missed several tournaments but not any Grand Slam events. Sinner accepted the ban to avoid a potentially harsher suspension from further hearings.