Stay here for live results and analysis from Day 4 of the U.S. Open.
u25a0 Complete scores and schedule.
How to watch: You can stream matches here (streaming began at 11 a.m., Eastern time). TV coverage begins on ESPN2 at 1 p.m.
Top-seeded Karolina Pliskova vs. Nicole Gibbs
Second match, Arthur Ashe Stadium
Pliskova, last year’s runner-up, is a heavy favorite, although Gibbs is fresh off winning a small tournament in Baton Rouge, La.