PARIS — Aryna Sabalenka's diamonds sparkled in the sun during a first-round victory at the heat-soaked French Open on Tuesday.

The top-ranked Sabalenka looked light on her feet on Court Philippe-Chatrier, despite wearing two thick necklaces, in a 6-4, 6-2 win against Jessica Bouzas Maneiro.

"Diamonds, I don't really feel the heaviness, but I can imagine how it looks from the outside," said Sabalenka, the tournament runner-up last year to Coco Gauff.

"So I feel pretty comfortable. For me, it's important to look good."

The four-time major winner was initially going to wear three necklaces, but said she thought that might be too much.

"It probably sounds a bit crazy, but when I feel good about what I'm wearing, how I look on court, I tend to perform much better," Sabalenka said.

"I like to bring a little bit of a fashion to the tennis court.

"I know the dress that I will wear for a Grand Slam, and I just try to come up with something to match the outfit."

Sabalenka said she wasn't worried about protecting her jewelry when she's off the court.

"I have my fiance. He's kind of like my security," she said, smiling.

"My physio does jujitsu, so I feel pretty secure walking around. If I go somewhere, I don't go alone."

Gauff began her title defense with a 6-4, 6-0 victory over fellow American Taylor Townsend, while four-time major winner Naomi Osaka beat Laura Siegemund 6-3, 7-6 (3) on Court Suzanne-Lenglen wearing a sequined gold playing dress.

Frenchwoman Lois Boisson, who made a surprise run to the semifinals last year when she was ranked 361st, lost 6-2, 6-2 to the 22nd-seeded Anna Kalinskaya.

For a third consecutive day, the temperature in Paris rose far above normal, reaching a scorching 35 C.

"I'm from Florida, so this is nothing. Shout-out to Delray Beach," said Gauff, who kept her spare rackets in a courtside cooler during the match.

Playing in the night session, top-ranked Jannik Sinner routed 171st-ranked French wild-card entry Clement Tabur 6-1, 6-3, 6-4 to extend his winning streak to 30 matches as he chases the only big title missing in his tennis career.

Stefanos Tsitsipas, the 2021 runner-up to Novak Djokovic, was leading 6-2, 3-0 against Alexandre Muller when his French opponent retired.

Muller injured his right calf, three months after injuring his left calf.

Ninth-seeded Alexander Bublik was beaten 7-5, 6-7 (6), 6-4, 7-5 by Jan-Lennard Struff.

Alexander Blockx withdrew from the tournament with a right ankle sprain, making Alex de Minaur — his scheduled second-round opponent — the first player into the third round.