Severin Lüthi, former coach of Federer, defends Sinner: "It is not by far a doping case"
The former right-hand man of the Swiss player supported the Italian tennis player in his doping case, although he did not want to go into details, and spoke about his union with Henry Bernet.
https://www.puntodebreak.com/en/2025/03/04/severin-luthi-former-coach-of-federer-defends-sinner-it-is-not-by-far-doping-case
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