Seth Wenig/Associated Press
How to watch: From noon to 11 p.m., Eastern time, on ESPN, and from 7 to 9 p.m. on ESPN2; streaming on the ESPN app.
The United States Open second round continues on Thursday, and the 2019 champions in doubles start their quests to repeat their titles. With a bevy of former major champions playing, it might be hard to know where to focus your attention.
Here are some matches to keep an eye on.
Because of the number of matches cycling through courts, the times for individual matchups are best estimates and certain to fluctuate based on the completion time of earlier play.