Britain's lone woman in the draw, seventh seed Johanna Konta, has not enjoyed the clay court season much but plays Hsieh Su-wei in round one.
My wife asked what I imagine many did across the world: "Wait, is that legal?" Yes.
The 23-time Grand Slam victor learned she was pregnant just two days before starting a successful assault on January's Australian Open and won't return before next year.
Despite the top seed distinction, Kerber isn't feeling too confident about her opportunities the next two weeks. An early exit would be no surprise for the struggling top seed. "It's now just a question of when not if he'll win his first Grand Slam".
"The way he played in the fourth and fifth set-I haven't seen tennis like that, ever", Isner said. She's not entirely wrong.
Muguruza raced through the first set against Schiavone as she kicked off the match against the 2010 Roland Garros champion with a double break.
The Scot at least has lower expectations on his shoulders this year, and said: "That can (help), but ultimately it doesn't really matter when you get on the court what anyone says, whether it's positive or negative".
Up until a week ago, Halep was the outright favourite for the title. After missing out on Monte Carlo with a hamstring injury, Raonic went on to play four tournaments in a row leading into Paris. Without them, there is no clear favorite to take the title.
David Goffin of Belgium has beaten French qualifier Paul Henri-Mathieu in straight sets to reach the second round of the French Open.
Djokovic won the 2016 French Open title, defeating Andy Murray in the final, while Serena Williams will be looking to better last year's second-place finish, having lost to Garbine Muguruza. The good news is he feels healthy and has not had an injury concerns over the past month, but the bad news is he has been drawn into the same quarter as Nadal. I'm emotionally attached like that!
Rising talent Alexander Zverev, the ninth seed from Germany, takes on Spain's Fernando Verdasco, while home favourite Kristina Mladenovic, a finalist in Stuttgart and Madrid this year, faces American Jennifer Brady. She's reached the quarters seven times, made the semis three times and won the title in 2009. Federer chose to skip the entire clay-court circuit to focus on preparing for grass and hard courts.
The Rome champion's stats this season are just wow! Rafael Nadal is favorite, as we said, but he had shown some significant flaws in his game. Can Halep land her major?
Below is all you need to know to watch Monday's action, and below that is a full list of pertinent singles matches featuring seeded competition.
However, an agonising series of wrist injuries pushed him to the brink of retirement before a comeback past year saw him reach the Olympics final. She has struggled at times to reproduce her impressive results from previous year, although she remains a unsafe proposition - particularly on clay. Kvitova initially planned a Wimbledon return but announced this week that she is ready to make her comeback. She can be a tricky hurdle for Muguruza in the second round here in Paris. That means it'll be a lot easier for someone else to make a run.
Defending champs at the draw ceremony on Friday. Mary Pierce (2000) is the last French woman to win Roland Garros, while Marion Bartoli's Wimbledon title (2013) is the last singles title by a French woman.
It's been a disastrous 2017 for the top two players on the ATP World Tour.