World No.1 Tennis Player Sinner Rehires Coach Linked to Doping Case

World No. 1 and Wimbledon champion Jannik Sinner has reappointed Umberto Ferrara as his fitness coach, a year after parting ways due to a doping scandal involving the banned substance clostebol. Sinner had dismissed Ferrara and physiotherapist Giacomo Naldi in 2024 after testing positive for clostebol, which authorities later determined entered his system inadvertently through a spray used by Naldi, supplied by Ferrara. An independent tribunal cleared Sinner of fault or negligence, but he still served a three-month suspension after a settlement with WADA, which accepted he did not intend to cheat. Sinner returned to competition in May 2025, losing the French Open final before winning Wimbledon. The decision to bring Ferrara back is described as a move towards continuity and high performance ahead of the Cincinnati Open and US Open. Sinner’s team emphasized Ferrara’s important role in his development, marking a renewed focus as Sinner prepares for future tournaments.