Marketa Vondrousova vs. Johanna Konta

The 26th-seeded Konta is the only one of the four remaining women who has played in a Grand Slam semifinal before. Because of the threatening weather and presold tickets for men’s matches on the Philippe Chatrier Court, Konta and Vondrousova will play on the new Simonne Mathieu Court, at the same time as Barty and Anisimova are squaring off on Lenglen Court. The WTA criticized the court assignments as “unfair and inappropriate.” A semifinal on a tertiary court is an exceedingly rare. At the 2011 U.S. Open, Samantha Stosur and Angelique Kerber played on the old Grandstand court. But even that court had 1,000 more seats than the 5,000-seat Mathieu Court.

Roger Federer vs. Rafael Nadal

Perhaps you’ve heard of these two men and their rivalry. Their 39th career matchup, but first at the French Open since 2011, is scheduled to begin at 12:50 p.m. in Paris, 6:50 a.m. Eastern. NBCSN and Tennis Channel will broadcast the match live, and we will provide live updates from Roland Garros at nytimes.com/sports.