Jannik Sinner has rehired fitness coach Umberto Ferrara almost one year after firing him for his role in the world No.1’s three-month doping ban. Sinner failed two drug tests last year and was suspended at all tennis events from February 9, 2025 to May 4, 2025 after a settlement with the World Anti-Doping Agency (WADA).

World No. 1 Jannik Sinner has rehired fitness coach Umberto Ferrara, nearly a year after firing him over the fallout from his doping case. He has also reappointed physiotherapist Giacomo Naldi, who had applied the banned substance on him.

Jannik Sinner has rehired his former fitness trainer, Umberto Ferrara, who left his camp last year following two failed doping tests. The world No. 1 twice tested positive for the banned substance clostebol. However, he proved that he was contaminated via a spray that Ferrero gave to his former physiotherapist, Giacomo Naldi.