PARIS — After letting another big lead slip with an error-strewn performance at the French Open, top-ranked Aryna Sabalenka felt like getting as far away from the courts as possible.

"I just want to quit tennis right now," Sabalenka said after wasting a lead of a set and two breaks in a 3-6, 7-5, 6-0 loss to Diana Shnaider in the quarterfinals on Wednesday. "We'll see in a few days. Hopefully I'll get back on track mentally."

Sabalenka's wait for a first French Open title continues despite the four-time major winner leading 4-1 in the second set and being two points from victory while serving for the match at 5-4. What followed was a complete collapse as she lost 12 of the last 13 games against a player appearing in her first Grand Slam quarterfinal, looking increasingly frustrated and forlorn in the windy conditions.

Just like her loss to Coco Gauff in last year's final, when she also won the first set before becoming undone with a slew of unforced errors, this one will take some time to get over.

"You know those rooms where you just go in and you smash everything," Sabalenka said. "Probably I will spend a whole day tomorrow over there destroying stuff. Maybe it will help, maybe not."

Shnaider next faces Maja Chwalinska, who extended her remarkable Roland Garros run by beating 22nd-seeded Anna Kalinskaya 7-6 (3), 6-3.

In the men's quarterfinals, 10th-seeded Flavio Cobolli beat No 4 Felix Auger-Aliassime 4-6, 6-4, 6-4, 6-4 and will face fellow Italian Matteo Arnaldi for a spot in the final.

Arnaldi advanced when Matteo Berrettini, yet another Italian, retired due to a left hip injury with Arnaldi leading 7-5, 5-2.

Berrettini had his hip treated during a medical timeout earlier in the second set.

The strong Italian showing comes despite top-ranked Jannik Sinner getting stunned in the second round.

Second-seeded Alexander Zverev and No 26 Jakub Mensik will meet in the other semifinal.

Missed opportunities

Sabalenka stood still and screamed loudly after losing a point to fall 0-30 down in the sixth game of the decider and, although she saved two match points at 0-40 down, she lost when she sent a shot into the net.

"I just think it's combination of everything," Sabalenka lamented. "You overthink, then you make easy mistakes, then you miss opportunities."

Her struggles were reminiscent of the match against Gauff, when she remonstrated loudly, shouting to herself and glaring at her team box.

"I just have to sit back and openly think about what's going on in my head in those tough moments," Sabalenka said, recalling that match. "Because I'm quite an experienced player. I have been through so many things, and I have overcome so many things."

Sabalenka had already looked agitated when serving for the first set but still looked in control as she served for the match in the second, holding a 30-15 lead.

"Of course I saw some moments of her frustration," Shnaider said. "I know Aryna, that she's a very emotional person."

Shnaider, who was already on her best run at a major, broke Sabalenka before taking complete control.

"Well, honestly I am speechless. Super happy," Shnaider said. "I feel like I was trying to focus point by point. Not thinking about the score. She is the world No 1, so I just tried to do my best. I just had to fight for every point."

Sabalenka looked increasingly frustrated as the third set wore on, and when she missed a volley at the net in the fourth game of the decider she crouched and rested her head on her racket.

Another upset

It was another big upset in a tournament where defending champion Gauff (third round) and four-time winner Iga Swiatek (fourth round) had already tumbled out.

Sinner, last year's runner-up, served for the match in a second-round defeat, and 24-time major winner Novak Djokovic wasted a two-set lead in a third-round loss.

That opened things up for lesser-known players. According to Opta, this is the first major without a former champion in either the men's and women's semifinals since the French Open in 1977.

Qualifier to contender

The unseeded Chwalinska came through three qualifying rounds to become only the second Polish woman to reach the semifinals at Roland Garros, along with Swiatek.

Chwalinska said British player Emma Raducanu's run to the 2021 US Open title as an 18-year-old qualifier had inspired her.

"It was such an impressive run, you know," Chwalinska recalled. "She was so young."

When Kalinskaya's big forehand from the back of the court went out, the 24-year-old Chwalinska had her biggest win, having never been beyond the second round at any major before this tournament.

Chwalinska's total prize money heading into Roland Garros was $864,030 and reaching the last four here earned her 750,000 euros (about $872,000).

Windy conditions

The roof was open on Court Philippe-Chatrier and there was a lot of wind.

"I don't know why would they keep the roof open when it was crazy windy," Sabalenka said. "It was very dirty tennis. I don't know how people could actually just sit there and watch me play."

Kalinskaya also struggled.

"I feel like I was fighting against the wind," she said. "It was cold today, so the ball was going slower. I couldn't use my speed, my power.