U.S. Open

The defending U.S. Women champion Sloane Stephens is out of the contest as 26-year old latvian avenges last years' quarter-final loss while serena williams, Rafael Nadal, Del Potro are through to the semis after quarterfinal victories at the flushing meadows in New York.
Spain's Rafael Nadal survived Austria's Dominic Theim's test after 0-6, 6-4, 7-5, 6-7, 7-6 victory to reach the U.S. Open semi-finals
Argentine Juan Martin Del Potro ended john isner's dreams of grand slam glory in his homeland, with a 6-7, 6-3, 7-6, 6-2 quarterfinal win at flushing meadows.
Serena Williams fought back from a break down in the first set to beat Czech eighth seed Karolina Pliskova 6-4, 6-3, and reach the semi-finals in suffocating conditions.
Defending U.S. Open champion Sloane Stephens was dumped out in the quarter-finals after losing 6-2, 6-3, to latvian 19th seed Anastasija Sevastova in sweltering conditions.

Sevastova becomes the first latvian woman to reach the semi-finals of the U.S. Open.

The 28-year-old Sevastova, who avenged last year's quarter-final loss to stephens will meet Serena williams in the semifinal.