Eighth seed Andreeva dismantled the Ukrainian star 6-1, 6-3 in just 76 minutes on Court Philippe-Chatrier on Thursday. Kostyuk hit 15 winners and committed 34 unforced errors as she lost serve five times and broke her 19-year-old Russian rival just once.

The 23-year-old stunned four-time Roland Garros champion Iga Swiatek 7-5, 6-1 in the fourth round in Paris before beating Ukrainian compatriot Elina Svitolina 6-3, 3-6, 6-2 in the last eight.

In her post-match press conference, Kostyuk was asked if she put too much pressure on herself before facing Andreeva.

"For me, usually when I go on court, I don't feel nervous, I don't feel more pressure. Maybe before the match, obviously everyone feels more nervous," Kostyuk explained.

"I would say, I don't care who's at the other side of the net, I just go out and play the match. Everything that could go her way went her way. Everything that could not go my way didn't go my way.

"So, it's just the type of day. I take it, I had enough tough days, bad days, to know that they end. It's not the worst thing in the world to lose a match, wherever the stage is.

"First time playing semi-finalsÃ¢¦ obviously, I have that experience for next time I'm in semifinals. Maybe I'm going to feel better, different. I don't know. Obviously, not the greatest match from me today, but I don't think about it that much."

Kostyuk, who won her two previous matches with Andreeva in straight sets, was then asked if the Russian's level surprised her.

"I think that this court suits her best of all the tournaments that exist, and I never played her here," she replied.

"Seeing her record since she's been 15 or 16 years old playing here, I saw that her record here is 16-3. I came into this tournament being like 4-7.

"So clearly not my best court. It really suits her game. The wind helped a lot today. I didn't start the best, but it happens. Everyone wins, everyone loses. It's part of the game. At the end of the day, it's just a game.

"Yeah, she played good today. She played solid, she wasn't missing. I was missing more, obviously felt pressure. She was serving much better today.

"I couldn't do a lot because the court is crazy slow, and she was retrieving all the balls, so I felt like I had to go for more. Obviously, that's what was making me make more mistakes. That's it."

Later in the day, Maja Chwalinska defeated No. 25 seed Diana Shnaider 7-6(4), 6-4 in a pulsating two hours and ten minute match. The 24-year-old Pole became the first qualifier in tournament history to reach the final.

"It's like a dream, honestly," Chwalinska said in her on-court interview.

"I don't know what's going on. I don't know what to say. I'm just very happy. It's so challenging to play against the best players in the world, day by day, but it's a Grand Slam so you just have to give your all and more. I'm not complaining at all."

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