Karolina Pliskova reached the U.S. Open quarterfinals for the third consecutive year, beating No. 18 seed Ashleigh Barty 6-4, 6-4.
Pliskova was the runner-up at Flushing Meadows in 2016, when she beat Serena Williams in the semifinals. They could meet again this year in the quarters.
Against Barty, the eighth-seeded Pliskova won all 10 of her service games, saving 8 of 8 break points.