The controversy centers on a pair of urine tests that Sinner failed over an eight-day period in March, testing positive both times for "low levels" of a banned substance called clostebol.
Sinner spoke publicly for the first time since the story broke, telling reporters he felt "relieved" at the decision by the International Tennis Integrity Agency to clear him of fault.
It's not ideal before a Grand Slam. But in my mind, I know that I haven't done anything wrong," Sinner said. "I always respect these rules, and I always will respect these rules of anti-doping."
Clostebol is an anabolic steroid that has a history of use as a performance-enhancing drug in sports; it is designated a Schedule III controlled substance in the U.S.
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