Jannik Sinner parts ways with physio at centre of doping storm after two failed drugs tests unearthed
ATP
Jannik Sinner has parted ways with the two people at the centre of his recent doping storm in his physiotherapist Giacomo Naldi and his fitness coach Umberto Ferrera as he adjusts his team ahead of the US Open.
Sinner tested positive twice for a banned substance in the form of Clostebol, but he was cleared of any wrongdoing. Despite that though, the tennis world has hankered down and made a judgement themselves on the case.
According to Italian publication Corriere dello Sport, the World No.1 has decided to part ways with Naldi who was responsible for giving him said massage which led to the banned substance entering his body.
Ferrera's role in this was that he bought the spray that contained the banned substance. People had spotted that neither had been there since the Halle Open in June.
Albeit Sinner tested positive in March and has been dealing with it since then so unless he only found out the reasoning recently, it seems odd that he kept them around. But now he has trimmed his team accordingly with Darren Cahill and Simone Vagnozzi of course still there.
"(Jannik Sinner)– everybody has to know – he had no part in this at all. Somehow, he’s tested positive through this connection with this particular spray, we don’t know how – working on his feet, massage," Cahill said.
"They were able to determine very quickly where it may have come from. It stayed quiet because he was innocent firstly, and there was no fault from anything he’d done. That’s what Sports Resolutions applied to us as well – that he could continue to play," he continued.
"He’s been the one who’s suffered through this the most. I take my hat off to him that he’s been able to post some of the results that he has. But there have been days where you can see that he’s physically and emotionally been challenged on the court."
Samuel GillEditor-in-Chief
Samuel Gill is the Chief Content Officer (CCO) of TennisUpToDate.com, a role he has held since 2020. He is responsible for editorial governance across the platform, including setting content standards, overseeing accuracy and consistency, and guiding long-term editorial strategy. Since joining, he has contributed more than 10,000 articles and editorial pieces across the TennisUpToDate network, playing a central role in the daily operation and development of the site.
Based in Leicester, Samuel has a broad background in tennis media. In his current role, he works closely with editors and writers to ensure coverage meets clear journalistic standards, with particular attention to verification, consistency, and timely updates when new information becomes available.
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