“Umberto Ferrara, connected with the Closteball case, joined Berrettini’s teamβ, β write: sport.ua
In August, it became known that in March, Sinner passed two positive doping tests for the drug Klostebol. However, a disqualification was avoided: the International Tennis Integrity Agency (ITIA) determined that contaminated samples were the cause. Clostebol got into the tennis player’s body through a spray that physiotherapist Giacomo Naldi used to treat a cut on his finger.
According to the ITIA report, Ferrara purchased this spray in Italy. Following the incident, Sinner dropped both Naldi and Ferrara from his team.