Tennis: Third seed Wawrinka into US Open quarter-finals

Australian Open champion Stan Wawrinka powered into the quarter-finals of the US Open on Monday with a 7-5, 4-6, 7-6 (9/7), 6-2 victory over Tommy Robredo.

The third-seeded Swiss fired 18 aces, rallying in the third-set tiebreaker and dominating the final set against the sixth-seeded Spaniard.

He will face either fifth-seeded Canadian Milos Raonic or 10th seeded Kei Nishikori of Japan for a place in the semi-finals.