The World Anti-Doping Agency (Wada) had challenged a decision last year by the International Tennis Integrity Agency (ITIA) not to suspend Sinner for what it judged was accidental contamination by a banned anabolic steroid last March.
In a statement on Saturday, Wada accepted that Sinner “did not intend to cheat”, but added: “However, under the code and by virtue of [court of arbitration for sport (CAS)] precedent, an athlete bears responsibility for the entourage’s negligence.
Jannik Sinner, the men’s world No 1, has been banned from tennis for three months in a settlement of his doping case.
Sinner’s explanation – that trace amounts of clostebol in his doping sample were caused by a massage from a trainer who used the substance after cutting his own finger – was accepted.
He will be eligible to play in the year’s next grand slam, the French Open, which starts on 19 May at Roland Garros.
