Jannik Sinner reappointed Umberto Ferrara as his fitness coach following a positive test for the banned substance clostebol. Sinner and physiotherapist Giacomo Naldi parted ways last year after the incident but have since aligned with management for continuity. Sinner received a three-month suspension after clostebol entered his system due to treatments from Naldi, who used a spray on himself before massaging Sinner. An independent tribunal cleared Sinner of fault. Sinner now aims for better performance as he approaches upcoming tournaments.
Jannik Sinner has reappointed former fitness coach Umberto Ferrara as part of preparations for the Cincinnati Open and US Open, ensuring continuity in his performance.
Sinner served a three-month suspension after clostebol was found in his system, which entered through massages by physiotherapist Giacomo Naldi using an over-the-counter spray.
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