PARIS (AP) — Novak Djokovic’s latest quest for a record 25th Grand Slam was ended by Brazilian teenager Joao Fonseca after a five-set fight in the third round of the French Open on Friday.

The three-time champion at Roland Garros lost 4-6, 4-6, 6-3, 7-5, 7-5 as temperatures again reached 33 degrees C (91 F). It was just the second time Djokovic has lost from two sets up, the other also coming in Paris in 2010.

The 39-year-old Djokovic looked exhausted in the fifth set but soldiered on.

“An incredible match to be part of. Obviously, tough one for me to lose being two sets to love up, but huge credit to Joao for really deserving to win the match,” Djokovic said. “I was barely standing on my legs toward the end of the match."

His exit leaves the men’s draw even more open following Jannik Sinner’s second-round exit on Thursday.

Djokovic mixed trademark defense with stunning winners and delicate drop shots to win the first two sets. But the 19-year-old Fonseca was resilient and tied the match on sets. In the final game, Djokovic had a break point for 6-6 but Fonseca served out with three consecutive aces and became the first teenager to beat Djokovic at a Grand Slam tournament.

“I just enjoyed being on court and what a pleasure it was. It’s my first stepping on court against him,” Fonseca said. “I was just trying to hit the ball as fast I could. Djokovic don’t miss, we still think he’s 20. At the end of the match I think he was more fit than me, that’s crazy.”

About his flurry of aces, he joked: “I felt like (big server) John Isner. I never did this before.”

Then he wished his mother in the crowd happy birthday and thanked all the Brazilians in the crowd.

Djokovic came to Roland Garros with doubts. After he lost the Australian Open final to Carlos Alcaraz, a shoulder injury limited his clay-court buildup to one competitive match. He labored for at least three hours in each of his previous two rounds but would have thought his chances of adding to his 2016, 2021 and 2023 French Open titles improved after Sinner's exit and with Alcaraz absent.

His last major title was the 2024 U.S. Open.

“Taking everything in consideration and all the circumstances, I think the level was really good,” Djokovic said. “Of course, right now, I'm being disappointed right off the court, losing, being close to winning.”

The heat that stressed Sinner also got to Djokovic, who applied ice packs on both sides of his face during changeovers. Still, he looked to be in command after taking the first two sets.

But Fonseca, who kept pushing Djokovic back with his big forehand, broke early in the third set and held on to it.

In the fifth set, Djokovic frantically tried to find ways to recover some energy against an opponent 20 years younger but he couldn't hide his fatigue: He hunched over the advertising boards, his forearms dangling; slumped back in his chair with a towel on his head; grabbed his head with his hands.

He was gracious in defeat.

“I told him (after the match) that he deserved to win and he should be proud of himself. We’ve all seen today why there is hype around him," Djokovic said. “Without a doubt he was a better player in important moments. Found incredible shots.”

Djokovic said he was unsure if he would play at the French Open next year, although he said the same after his semifinal defeat to Sinner last year.

Kostyuk keeps going

Still unbeaten on clay this season, Marta Kostyuk reached the fourth round for the second time and set up a big match against four-time champion Iga Swiatek in the women's draw.

The 15th-ranked Ukrainian extended her winning streak on clay to 15 matches by 6-4, 6-3 over Viktorija Golubic on yet another hot day in Paris. Ahead of Roland Garros, she won in Madrid — the biggest title of her career — after she claimed another clay-court title in Rouen, France.

She lost to Swiatek in the fourth round in 2021. A rematch is coming up next after Swiatek defeated fellow Polish player Magda Linette 6-4, 6-4.

“Marta is having a great season,” said Swiatek, who has not won a title on clay since the 2024 French Open. “She always had a game to play well. Did some semifinals of big tournaments before. Now she won Madrid. So good for her.”

Swiatek, however, has won in straight sets all three times against Kostyuk and boasts a 43-3 record at Roland Garros.

“I would love to be the one who is a favorite in this match, but I still don’t think it’s the case,” Kostyuk said. “Even though I have this really long streak.”

Seventh-seeded Elina Svitolina was another Ukrainian woman to advance. She beat Tamara Korpatsch 6-2, 6-3.

Double bagel

Also advancing was 36-year-old Sorana Cirstea, who routed Solana Sierra and became the oldest player in the Open Era to claim a 6-0 6-0 win in a Grand Slam tournament. She next faces Wang Xiyu of China, who beat Ukrainian Yuliia Starodubtseva 6-3, 7-5. The Chinese qualifier has still not dropped a set.

Eighth-seeded Mirra Andreeva progressed with a 6-4, 6-2 win against Czech opponent Marie Bouzkova. Andreeva leads the women’s tour with 32 victories this season. Her fourth-round match pits her against Jill Teichmann, who beat 10th-seeded Karolina Muchova 6-1, 7-5.

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AP tennis: https://apnews.com/hub/tennis

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