A retired Italian tennis player has suggested that Jannik Sinner never wanted to get rid of fitness trainer Umberto Ferrara in the wake of his anti-doping case last year. The world No. 1 was found to have “bore no fault or negligence” after proving the tests were the result of contamination.

Jannik Sinner has reappointed fitness coach Umberto Ferrara to his coaching team having previously dropped Ferrara during Sinner’s recent doping suspension.

Sinner ultimately accepted a three-month ban in February after reaching a settlement with Wada. Wada said it accepted the four-time Grand Slam champion did not intend to cheat, but he bore responsibility for "the entourage's negligence".