Australia's Samantha Stosur will take on Sara Errani of Italy in the French Open semifinals after both won through in straight sets on Tuesday.

US Open champion Stosur powered past Dominika Cibulkova of Slovakia 6-4, 6-1, while 21st seed Errani saw off Angelique Kerber of Germany 6-3,7-6 (7/2).

The two remaining quarterfinals will be held on Wednesday with second seed Maria Sharapova of Russia taking on Kaia Kanepi of Estonia and fourth seed Petra Kvitova of the Czech Republic going up against qualifier Yaroslava Shvedova of Kazakhstan.

The sixth-seeded Stosur had too much firepower and experience for the lightweight 23-year-old Cibulkova and was only briefly under pressure in the second game of the second set when she stoodat 0-40 on her serve.

Both players had previously gone deep into the tournament at the French Open with Stosur reaching the final in 2010, where she lost to Francesca Schiavone of Italy, and Cibulkova the semifinals the previous year.

With the sunshine back on the Philippe Chattier centre court after the gloom of Monday, games went with serve until the

fifth game when Stosur hit a series of big topspin forehands that Cibulkova struggled to deal with.

The Australian held to lead 4-2 and made it a double break in the next game with her forehand again proving to be her best weapon.

Cibulkova, the smallest player in the WTA top 100 at 1.61m, hit back immediately to break serve for the first time in the match and then moved to 5-4.

She had three further break points to level at 5-5, but on each occasion Stosur took the initiative in the rallies to deny her. She then hit two more big, looping forehands to pocket the first set.

Cibulkova, who knocked out top seed Victoria Azarenka in the fourth round, again squandered three break points in the second game of the second set and Stosur then turned on the power again to break to 15 in the following game.

Stosur moved 3-1 ahead and when she broke again to get to 4-1, there was no way back for an outgunned Cibulkova.

Errani's upset win over hard-hitting Kerber made sure of Italian representation in the semifinals at Roland Garros for the third year in succession, following the trail blazed by compatriot Francesca Schiavone, the 2010 champion and runner-up last year.