LONDON (AP) 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.
Seventh-seeded Gilles Simon of France resisted early pressure in each set to defeat Thanasi Kokkinakis of Australia 6-4, 6-2.
Simon lost the first nine points but won the next four games to gain an advantage in the opening set, and after fighting off a break point when down 2-1 in the second, he broke Kokkinakis to lead 3-2. A running backhand winner down the line secured him a second break for 5-2.