London - French Open champion Stan Wawrinka's eight-match winning streak ended at Queen's Club on Wednesday when Kevin Anderson edged him 7-6 (4), 7-6 (11).
It was the South African's fourth successive win over Wawrinka.
Anderson pressured the second seed from the start, holding a break point in the opening game. Although Wawrinka stood firm and held two set points at 6-5, it was Anderson who took the tiebreaker.
In the second set, Wawrinka saved a break point when down 3-2, but Anderson always held an advantage in the tiebreaker. In a tense finale, Wawrinka saved five match points, and held three set points before Anderson finally closed out the second-round match with his 22nd ace.