World number one Jannik Sinner reappoints fitness coach Umberto Ferrara less than a year after they parted company.

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.

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