In the women's draw, World No. 2 Coco Gauff will play 18-year-old Tereza Valentova, who, just a year ago, won the junior Grand Slam final at Roland-Garros, while No. 3 seed Jessica Pegula will face 24-year-old American Ann Li.

PARIS — Novak Djokovic experienced the lowest of lows — pulling out of the French Open after tearing the meniscus in his right knee — and the highest of highs — winning a long-sought Olympic gold medal for Serbia — at Roland-Garros last year. This trip to the site went smoothly, once he got going.

For Novak Djokovic, this is a relatively easy call. He thinks the French Open is making a mistake by eschewing the electronic line-calling used at most big tennis tournaments and instead remaining old school by letting line judges decide whether serves or other shots land in or out.