Andy Murray's reign as defending U. S. Open tennis champion ended Thursday in a surprising, frustration-filled 6-4, 6-3, 6-2 quarter-final loss to ninth seeded Starnislas Wawrinka.
Third seeded Murray won his first Grand Slam title at Flushing Meadows last year and his second at Wimbledon this July.
But he was overmatched from the beginning on a blustery day in Arthur Ashe Stadium.
This marks the first time since 2010-- when he lost in the third round to Wawrinka-- that Murray failed to reach the semi-finals at the U. S. Open. Wawrinka reaches his first Grand Slam semi-final.