But Stefanos Tsitsipas belied his years with a performance full of confidence and grit, saving 11 out of 12 break-points against Roger Federer. Coming into the match, the Greek 21-year-old led the tournament in service games won, with 35 out of 37. Federer was unrecognisable from the player who dominated Novak Djokovic in his final round-robin match.