Six years after upsetting Simona Halep on Arthur Ashe Stadium, Taylor Townsend pulled off another Top 5 upset at the US Open, knocking out Mirra Andreeva to reach the fourth round for a second time.

The No. 9 seed is through to the US Open fourth round for the first time, where she’ll face Marketa Vondrousova.

Stefanos Tsitsipas was slumped out of the US Open on Thursday in the second round but he didn't take it lightly after his opponent Daniel Altmaier decided to underarm serve to end the tie.

Highlights of the fifth day at the US Open at Flushing Meadows on Thursday (times GMT):0402 ALTMAIER UPSETS TSITSIPAS German Daniel Altmaier knocked out Stefanos Tsitsipas 7-6(5) 1-6 4-6 6-3 7-5 in a ...

Stefanos Tsitsipas was eliminated from the U.S. Open on Thursday in a major upset, and he was openly unhappy with his opponent after the match. Tsitsipas ...

Altmaier used the controversial underhand tactic as part of a rally to win in five sets, 7-6 (5), 1-6, 4-6, 6-3, 7-5, in a ...