Jannik Sinner says he is no longer working with physiotherapist Giacomo Naldi and fitness trainer Umberto Ferrara following the investigation into his positive tests for a banned substance.
The world number one twice tested positive for clostebol – a steroid that can be used to build muscle mass – in March.
The Italian was cleared of fault or negligence by a tribunal last week, with the International Tennis Integrity Agency (ITIA) finding Sinner had been inadvertently contaminated with the substance by Naldi.
Naldi had been applying an over-the-counter spray – given to him by Ferrara – to a cut on his own hand before then carrying out treatments on Sinner.
“I want to start with [saying] that they have been a huge part for my career,” Sinner said in a news conference at the US Open on Friday.
“We made an incredible job, bringing a lot of success and then having a great team behind me.
“Now, because of these mistakes, I’m not feeling that confident to continue with them.
