No signs of trouble so far for the two men who've faced off in the past two finals. Dominic Thiem rolled to his first set, 6-1, over Jack Sock, before Rafael Nadal joined him with a 6-1 lead of his own over Mackenzie McDonald.
After taking a short warmup, Serena Williams and coach Patrick Mouratoglou mutually decided it wasn't in the 23-time major champion's best interest to play. Here's what Serena had to say about the decision and the seriousness of her Achilles injury, which first flared up in the US Open semifinals.
"I think I need four to six weeks of sitting and doing nothing, at least two weeks of just sitting down, and then from after that two weeks I have been told that I need to start doing a little training."
"This is not a nagging injury. This is an acute injury. So if it was my knee, that would be more really devastating for me. But this is something that just happened, and it's super acute. That's totally different. I feel like my body is actually doing really, really well. I just ran into, for lack of a better word, bad timing and bad luck, really, in New York."
Top seed Simona Halep was a popular pre-tournament pick to win Roland Garros, and it's understandable why given her 15-match win streak. But Amanda Anisimova might have something to say about that if the Romanian advances later today after the American defeated the 2018 winner in the quarterfinals a year ago.
Moved last-minute to Chatrier, Anisimova needed just 57 minutes to overwhelm countrywoman Bernarda Pera. The left-hander actually broke to start the match, and held two game points for a chance to consolidate. That didn't happen and Anisimova would take complete control in winning 58 percent of her return points.
In another match full of stars and stripes, 20-year-old Sebastian Korda knocked out top-ranked American John Isner, 6-4, 6-4, 2-6, 6-4. Korda won 57 percent of his second serve points to Isner's 43 percent success rate en route to becoming the first man born in 2000 to reach the third round at the clay-court major.