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.by a tribunal last week, with the International Tennis Integrity Agency finding Sinner had been inadvertently contaminated with the substance by Naldi.
"I was struggling a lot in the last months. Now I was waiting for the result, and now I just need some clean air."Speaking for the first time since the news emerged on Monday, Sinner said it was a "relief" the investigation was over. "Here I also know who is my friend and who is not my friend, because my friends, they know that I would never do that.He was given an automatic provisional suspension when he tested positive but was able to keep playing after successfully appealing against it.
"I know sometimes the frustration of other players obviously. But maybe because they got suspended is they didn't know exactly where it comes from.Other players have also expressed surprise at how quickly the process took place, with fewer than five months between the positive test and a verdict.
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