Jannik Sinner has rehired Umberto Ferrara, the fitness coach who purchased the healing spray at the center of his doping case.

Wimbledon champion Jannik Sinner has confirmed he has reappointed his former fitness coach Umberto Ferrara with immediate effect. Italian world No.1 Sinner parted ways with Ferrara and physiotherapist Giacomo Naldi last year after the investigation into his positive tests for the banned substance clostebol in March.

Nick Kyrgios has hit out at Wimbledon champion Jannik Sinner over his decision to re-appoint the fitness coach he split with after last year’s positive tests for banned substance clostebol.