Maria Sharapova secured her place in the last four of the French Open with a 6-3 6-4 win over Anna Chakvetadze.
Maria Sharapova celebrates victory
The second seed's semi-final opponent will be Ana Ivanovic, who beat third seed Svetlana Kuznetsova 6-0 3-6 6-1 to reach her first Grand Slam semi-final.
Jelena Jankovic joined fellow Serb Ivanovic in the last four with a 6-4 7-5 win over Nicole Vaidisova.
Jankovic's next opponent is top seed Justine Henin, who beat American Serena Williams 6-4 6-3.
Sharapova's win means both the top two seeds are through to the semi-finals.
The Russian, seeded two, has been struggling with a shoulder injury but she was pleased with her form after beating Chakvetadze in 78 minutes.
"I was moving really well and I tried to defend," said the 20-year-old.
"That was the key. I was just retrieving well. I'm happy to be in the semi-final for the first time."
Of her next match against Ivanovic, Sharapova added: "She hits the ball pretty flat and big. It will definitely be a very tough match."
Ivanovic restricted last year's runner-up Kuznetsova to just 10 points in a one-sided final set.
Her victory means Paris could see an all-Serbian final, but Ivanovic said: "It's important I
keep that to one side, and just play my semi-final.
Wherever you go you see Serbians winning matches it's incredible
"I'm excited to get this far and the tournament is still not over."
Kuznetsova suffered a second consecutive defeat to Ivanovic after losing the Berlin final in the lead-up to the French Open.
The Russian had treatment in the third set for a stomach injury and blamed the problem for her below-par display.
"I had the same injury last year," she said.
"It was when it was 5-3 in the second set. I served hard and I think I pulled it."
Jankovic prevented Vaidisova from making a second consecutive appearance in the Paris semi-finals by means of her superior court speed and her fierce backhand.
The 18-year-old survived four match points before bowing out by netting a forehand to put Jankovic through.
It is the first time two Serbian women have made it into the semi-finals of a Grand Slam, and Novak Djokovic could reach the men's semis with victory over Igor Andreev on Wednesday.
Jankovic, 22, said: "Wherever you go you just see Serbians all over the place, winning all these matches it's incredible."
And Ivanovic added: "It's very exciting for us and I'm sure people back home are very proud of us."