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 re-appointed his former fitness coach Umberto Ferrara with immediate effect, the Italian world number one confirmed on Wednesday.

Wimbledon champion Jannik Sinner has rehired Umberto Ferrara as his fitness coach nearly a year after firing him for his role in the top-ranked player’s doping case