Karolina Pliskova and Reilly Opelka were among the early winners on the second day of the U.S. Open.
Pliskova, a 2016 finalist, beat Caty McNally 6-3, 6-4 in her first-round match as the former world No. 1 tries continues her rebound from several lean years on the tour. Pliskova lost the Wimbledon final this year and fell to 0-2 in major finals.
Reilly Opelka, one of 15 Americans playing in bottom half of the draw on Tuesday, defeated Soonwoo Kown 7-6 (7), 6-4, 6-4.
Mackenzie McDonald, another American, beat David Goffin 6-2, 7-5, 6-3. McDonald needed surgery for a torn hamstring tendon a little more than two years ago and couldn’t walk for weeks. He lost the Citi Open final in August in Washington.