Coco Gauff plays a shot against Iga Swiatek during their quarterfinal match at the French Open Wednesday in Paris. Christophe Ena/Associated Press

PARIS  — This felt like a game Coco Gauff simply needed to claim if she intended to finally win a set, let alone a match, against No. 1 Iga Swiatek.

With shouts of “Go, Coco!” and “Allez, Coco!” emanating from the Court Philippe Chatrier stands, Gauff frittered away two break points as Swiatek served at 1-all. Then, at deuce, came the most memorable moment of Wednesday afternoon — and, while Gauff won the point, it soon would be Swiatek who seized complete control of this French Open quarterfinal that was a rematch of last year’s final.

During a 14-stroke exchange, both women made their way to the net, and Gauff directed a swinging backhand volley right at Swiatek. The ball struck Swiatek’s right leg, and she tumbled back onto the red clay, leaving rust remnants on her white dress and arm. That set up a third break chance for Gauff, but the 19-year-old American again failed to convert, and while it soon was 2-all, Swiatek pulled away from there to a 6-4, 6-2 victory.

“I didn’t try to hit her. I was just trying to hit the ball hard in the middle of the court, and it happened to hit her, obviously. I apologized after, but I think she knows that’s part of the game. If you hit a bad ball and you decide to run to the net, there’s always a risk that you get hit — and there’s always the risk that the person might miss, trying to avoid you,” Gauff said. “If I was in her position, I wouldn’t be mad at me, either, because she ran forward. I think when I said sorry, she shook her head, and we had a mutual understanding that that was the only shot I really had.”

When a reporter asked Swiatek whether it’s unusual to get directly hit like that, she agreed with the premise. She also said she couldn’t be sure whether Gauff had another option.

“But I know Coco is a nice person, and she wouldn’t mean it,” said Swiatek, a 22-year-old from Poland who is seeking a third title at Roland Garros and fourth Grand Slam trophy overall. “Nothing personal. It happens.”

She improved to 7-0 against No. 6 Gauff and has won all 14 sets they’ve played against each other; that includes a 6-1, 6-3 victory for the 2022 championship in Paris.

“Obviously,” Gauff remarked, “you lose to someone seven times, you feel crappy.”

On Thursday, Swiatek will meet No. 14 seed Beatriz Haddad Maia, the first woman from Brazil to reach a Grand Slam semifinal since Maria Bueno at the 1968 U.S. Open. The other women’s matchup for a berth in Saturday’s title match will be No. 2 Aryna Sabalenka, who won the Australian Open in January, against unseeded Karolina Muchova of the Czech Republic.

On Thursday, Swiatek will meet No. 14 seed Beatriz Haddad Maia, the first woman from Brazil to reach a Grand Slam semifinal since Maria Bueno at the 1968 U.S. Open. The other women’s matchup for a berth in Saturday’s title match will be No. 2 Aryna Sabalenka, who won the Australian Open in January, against unseeded Karolina Muchova of the Czech Republic.

In the men’s quarterfinals, No. 22 Alexander Zverev beat Tomas Martin Etcheverry 6-4, 3-6, 6-3, 6-4 to reach the semifinals for the third consecutive year. At that stage in 2021, Zverev lost to Stefanos Tsitsipas in five sets; in 2022, Zverev tore ligaments in his right ankle during a fall late in the second set against Rafael Nadal.

Zverev’s next opponent will be No. 4 Casper Ruud, who beat No. 6 Holger Rune 6-1, 6-2, 3-6, 6-3 on Wednesday night. The other semifinal is No. 1 Carlos Alcaraz vs. No. 3 Novak Djokovic.

Last season, Ruud was the runner-up to Nadal in Paris and to Alcaraz at the U.S. Open. Ruud topped Rune in a contentious quarterfinal at the French Open in 2022, but this one was notable for how one-sided it was for the first hour or so. Rune kept making mistake after mistake — seven double-faults and 30 unforced errors in all across the first two sets alone — and, while he straightened things out eventually, it was Ruud who regained control early in the fourth set.

Haddad Maia advanced by coming back for a 3-6, 7-6 (5), 6-1 victory over No. 7 Ons Jabeur, a two-time major runner-up in 2022.

Haddad Maia is a 27-year-old left-hander who was given a 10-month suspension after failing a doping test in 2019. She arrived in Paris with a 7-11 record at majors, never winning so much as one second-round match, until this 5-0 run.

“One of my qualities,” Haddad Maia said, “is that I wait and I’m very patient and I never give up.”

Before even knowing she would face Swiatek, Gauff spoke about hoping for that opportunity. She insisted she wanted another shot at Swiatek, who has topped the rankings for more than a year.

Gauff tried some new tactics, with a measure of success early, looping high-arcing, high-bouncing shots, instead of her standard big hitting.

“I didn’t win, so it didn’t work, but I think on certain points it did,” Gauff said. “But, yeah, I have to figure something out.”

This one was even early, at 4-4 in the first set, before Swiatek edged ahead. First she held, then she broke at love, smacking a cross-court forehand to own that set, then raising her right fist and shaking it.

Swiatek’s heavy-topspin forehand is probably her best shot. That also happens to be Gauff’s weaker side. A glance at the stats demonstrated the disparity: Swiatek finished with a 12-1 advantage in forehand winners.

After dusting herself off when she got hit by the ball in the second set — “Sometimes being in clay, it feels like you’re just out there doing dirty work,” Swiatek would say later — she lifted her play.

And it was Gauff, wearing a bandage on her right knee after scraping it in her previous match, who began having trouble with shot selection and execution. By the end, Gauff had far more unforced errors, 23, than winners, 13.

Yet to drop a set in the tournament, Swiatek broke to go up 4-2 in the second with the help of a double-fault, and again in the last game with the help of another double-fault.

Gauff was told at her news conference that she didn’t seem quite as crestfallen as she appeared to be after a fourth-round loss at the Australian Open in January.

“I wouldn’t say I’m more at peace. To be honest, I’m still very frustrated, but I guess I’m trying not to show it as much,” Gauff said. “Yeah, I don’t want those pictures on the internet.”