Praise for how tennis has handled Jannick Sinner's doping case.
The world number one has been fined, but escaped suspension, for unwittingly being contaminated with a steroid.
United States Anti-Doping Agency chief executive, Travis Tygart, is congratulating the Independent Integrity Unit for International Tennis on how they handled Sinner's unique case.
D'Arcy Waldegrave talks with USADA CEO Travis Tygart in a full interview.
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