US Open 2017: Madison Keys beats Kaia Kanepi in quarters to complete American sweep of women's semifinals

American Madison Keys overpowered Kaia Kanepi in straight sets to win her quarterfinal tie and complete an all-American line-up in the US Open women's singles semi-finals.

The 15th seed won 6-3 6-3 to join Coco Vandeweghe, Venus Williams and Sloane Stephens in the last four. It is the first time since 1981 that four American women have made the semi-finals in New York, and the first time anywhere since Wimbledon 1985.

Vandeweghe, seeded 20th, beat Czech top seed Karolina Pliskova 7-6 (7-4) 6-3. Williams, 37, is the only one of the four Americans to have reached a Grand Slam final, the first of which came at Flushing Meadows 20 years ago.