Andy Roddick said WADA is Jannik Sinner's only big 'rival'
Roddick, who has always used important words for the Italian tennis player, went so far as to suggest that there are no weak points in the game of the ATP number 1, bringing up a comparison with Roger Federer, Rafael Nadal and Novak Djokovic: the American believes that Jannik could get close to the level of the Big 3.