Mirra Andreeva reaches the French Open semifinals at age 17, and will face Jasmine Paolini, 28

PARIS — With the insouciance of a 17-year-old having the time of her life in Paris, Mirra Andreeva says she and her coach work out a game plan before a tennis match — and then she forgets all about that, preferring to just wing it.

Seems to be working out fine so far: The unseeded Russian is the youngest Grand Slam semifinalist in more than a quarter-century.

Playing in only her sixth major tournament, Andreeva got past an ill No. 2 seed Aryna Sabalenka 6-7 (5), 6-4, 6-4 at the French Open on Wednesday. Next, on Thursday, Andreeva goes up against another surprising player: No. 12 Jasmine Paolini, a 28-year-old Italian who reached her first major semifinal by defeating No. 4 Elena Rybakina 6-2, 4-6, 6-4.

''I always play the way I want to play. We have a plan with my coach for the match, but after, I forget everything, and when I play a match, I don't have any thoughts in my head,'' said the 38th-ranked Andreeva, who is based in Cannes and coached by 1994 Wimbledon champion Conchita Martinez. ''So maybe I would say that my strength could be that I just play how I want to play and I do whatever I want to do.''

Words many the parent of a teenager probably has heard at home.

The other matchup Thursday will be No. 1 Iga Swiatek against No. 3 Coco Gauff. Swiatek is seeking her fifth Grand Slam title and fourth in Paris; Gauff won the U.S. Open last September and was the runner-up to Swiatek at Roland Garros in 2022. They both won singles quarterfinals on Tuesday.

Gauff, with Katerina Siniakova, and Paolini, with Sara Errani, also are into the semifinals in doubles; Andreeva withdrew from that event before her quarterfinal scheduled for Wednesday.

Andreeva's success at her age is not unprecedented. But it's been a while.

She is the youngest Grand Slam semifinalist since Martina Hingis at age 16 in 1997. You need to go even farther back to find a younger player who eliminated a woman ranked No. 1 or 2 at Roland Garros: 1990, when Monica Seles — like Hingis, now a member of the International Tennis Hall of Fame — was 16 when she beat Steffi Graf in the final.

''I would say that I am almost like a normal teenager, because I still have to do my school that I don't like to do. I watch a lot of TV series in my spare time. I watch Netflix. I sometimes spend too much time on my Instagram,'' Andreeva said. ''But maybe what makes me a little different is that, I don't know if I can say that I'm mature, but I feel myself a mature person, and I feel that I know what I'm doing.''

So even if she and Martinez go over strategy ahead of time, those tactics are not necessarily implemented.

According to Andreeva, she figures things out from shot to shot.

''I decide: ‘Well, what should I do? Should I go down the line or should I do cross? Should I do a drop shot. Should I do a lob?'" said Andreeva, whose sister, 19-year-old Erika, lost to Sabalenka in the first round last week. ''That's sometimes not really good, because I have a lot of decisions in my mind."

She has yet to win a tour-level title of any sort and is competing in only her fifth Slam tournament.

Sabalenka, meanwhile, is a two-time champion at the Australian Open, including in January, and had won the first 23 Grand Slam sets she played in 2024 until dropping two in a row against Andreeva. Dealing with a stomach illness, Sabalenka was visited multiple times by a trainer and doctor and often clutched at her midsection.

There were plenty of momentum shifts, and the outcome felt in doubt until the very last game, when Andreeva broke with a beautiful lob that Sabalenka didn't even move to try to get to.

''If we look back,'' Andreeva said later, ''I wouldn't expect myself (in the) semifinals.''

Had Sabalenka and Rybakina won, this would have been only the second time in the professional era, which began in 1968, that the women seeded 1-4 all advanced to the semifinals in Paris. The other was way back in 1992.

But Paolini and Andreeva prevented that.

With Jannik Sinner into the men's semifinals, it is the first time an Italian woman and Italian man both have appeared in the final four at the same Grand Slam tournament in the same year. It's quite a moment for their country in tennis: On Monday, Sinner will become the first man to be No. 1 in the ATP rankings.

The men's semifinals are Friday, when Sinner will play Carlos Alcaraz, and Alexander Zverev will take on Casper Ruud. Zverev reached the final four in Paris for the fourth consecutive year, beating Alex de Minaur 6-4, 7-6 (5), 6-4 at night.

Paolini exited in the first or second round in each of her first 16 Grand Slam appearances before making it to the fourth round of the Australian Open. Now she's made it two steps beyond that.

For Paolini, Thursday is a chance for a rematch against Andreeva, who is more than a decade younger but won their meeting last month at the Madrid Open on clay.

''She's so young but she's so, so good mentally. And she can defend very well. She can serve well,'' Paolini said. ''It's going to be a tough match, but we are in the semifinals, so there is no chance to get easy matches.''

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