Russian sixth seed Daniil Medvedev went down in five sets to Australian wildcard Adam Walton in the first round of the French Open on Tuesday.
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It was the seventh time in 10 French Open appearances that the former world No 1 has fallen in the first round.
"I know that I am in good shape and I can play well in Roland Garros. I can," Medvedev said.
"It's just tougher for me, and first rounds are usually tougher for me, but I will always come here."
UPSET ALERT 🚨
— Roland-Garros (@rolandgarros) May 26, 2026
Australian wild-card Adam Walton knocks out Daniil Medvedev 😱#RolandGarros pic.twitter.com/52MxUVkgrS
Rising US star Iva Jovic, 18, further confirmed her potential as she strolled past Alexandra Eala 6-4, 6-2 to book a clash with compatriot and former world No 8 Emma Navarro, who defeated Indonesian Janice Tjen in straight sets.
Stefanos Tsitsipas, the 2021 runner-up, ensured he will at least equal his best major performance since Roland Garros two years ago. He showed glimpses of the shot-making that once took him into the world's top three in a match cut short by his opponent Alexandre Muller's retirement through injury.
The 27-year-old Greek has plummeted to 79 in the world rankings but could reach the last 32 for the first time in seven Grand Slam appearances when he plays Italian Matteo Arnaldi in the second round.
French 17-year-old Moise Kouame won his first match at his home major; an impressive 7-6 (7/4), 6-2, 6-1 victory over 2014 US Open winner Marin Cilic of Croatia.
Remember the name 💎
— Roland-Garros (@rolandgarros) May 26, 2026
17-year-old Moise Kouame records his first Grand Slam match win 🇫🇷#RolandGarros pic.twitter.com/lhTWSSruP9
Conditions will have cooled somewhat when Jannik Sinner makes his bow later Tuesday.
The 24-year-old stands on the brink of a career Grand Slam, with the French Open the only major title still to elude his grasp.
Double-reigning champion Carlos Alcaraz is absent and the Italian has a 29-match win streak but six rounds stand between him and the men's final on June 7.
His French first-round opponent, Clement Tabur, will command the vast majority of the support in the night session on centre court.
Sinner is returning to Court Philippe Chatrier almost 12 months on from his five-set defeat in last year's final when he held three championship points against Alcaraz.