Seeded losers in the men's first round: No. 14 Jack Sock, No. 31 Gilles Simon, No. 32 Mischa Zverev.
Novak Djokovic began the defence of his French Open title by easing to victory under the gaze of new coach Andre Agassi while Rafael Nadal launched his pursuit of a record 10th French Open title in brutal fashion Monday.
But he has since undergone a tumultuous period culminating in a split from his former coaching team. We wonder what that conversation was about? Djokovic, the world No. 2 men's player, advances to face Portugal's Joao Sousa in the second round on Wednesday. Zverev, coming off a title at the Italian Open, dropped the first set 6-4 then took the second 6-3. But the Spaniard then brought his A-game to brush aside the Frenchman in less than two hours with two breadsticks. Nadal will now face Robin Haase in the second round after he beat Alex De Minaur on Sunday. After being broken early, she reeled off three games in a row to go ahead of her opponent at 3-2, but after missing the chance to go a break in front, she succumbed to a strong response from Muguruza.
Muguruza, who stunned Serena Williams in last year's final, triumphed 6-2, 6-4 to set-up a second round clash with Anett Kontaveit of Estonia.
This stunning return by Marcel Granollers that shot between the net and the chair umpire and even had Novak Djokovic applauding. "I'm really enjoying it so far".
"I will catch up because I will have a credit with God and, hopefully, God will forgive me".
One step closer to a 10th Roland Garros.
Garbine Muguruza comes through against Francesca Schiavone in Paris
"I hate tennis sometimes. It's like when you marry someone". The out-of-form Spaniard faces a tricky encounter against 2010 victor Francesca Schiavone of Italy. "Do I believe those are the solutions? No".
The 2015 French Open champion has struggled this season. This is exactly what I need at this moment, a person like him [who] understands the transitions as a tennis player and as a person, as well, going through lifestyle and certain choices that you make, how that affects you later on.
Thiem, the 23-year-old world No. 9, has already faced Nadal three times on clay in the past few months - losing in the finals in Barcelona and Madrid before gaining revenge in the quarter-finals in Rome.
Spanish veteran Feliciano Lopez has defeated Bjorn Fratangelo 6-4 7-6 (7-4) 6-3, while Croatian 20-year-old Borna Coric saw off Mathias Bourgue 7-6 (7-5) 6-3 6-2.
Also, big-hitting Australian teenager Jaimee Fourlis served up a major scare for Caroline Wozniacki at Roland Garros on Monday, making light of the 300-plus ranking places separating them to push the 11th seeded Dane to three sets.
But a back problem suffered in practice on Sunday nearly put paid to her chances before she had started and she needed all her fighting spirit to defeat Jennifer Brady 3-6 6-3 9-7 in a match that lasted one minute short of three hours.