The Latest from the French Open:

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4:03 p.m.

A final backhand winner down the line and Timea Bacsinszky makes it to her first semifinal at a Grand Slam tournament.

The 23rd-seeded Swiss player defeated Alison Van Uytvanck of Belgium 6-4, 7-5 on Court Suzanne Lenglen to set up a semifinal match with top-ranked Serena Williams.

"It's just incredible," Bacsinszky said.

Bacsinszky becomes the first Swiss female player to reach a Grand Slam semifinal since Patty Schnyder at the 2004 Australian Open.

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3:23 p.m.

Top-ranked Serena Williams has reached the French Open semifinals after beating former finalist Sara Errani 6-1, 6-3.

Williams, who is seeking a 20th Grand Slam title, cruised through the first set in 27 minutes but the 17th-seeded Italian, who lost the final in 2012, tested her somewhat more in the second set.

Williams next plays either Timea Bacsinszky of Switzerland, who is seeded 23rd, or Alison Van Uytvanck of Belgium, who is unseeded.

They are playing their quarterfinal on Suzanne Lenglen Court, with Bacsinszky taking the first set.

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2:20 p.m.

Celebrations on court No. 1 as Czech player Lucie Safarova reaches another semifinal, this time in doubles.

Playing alongside American Bethanie Mattek-Sands, she won 7-5, 6-2 against the top-seeded pair of Martina Hingis and Sania Mirza.

Safarova is gunning for two trophies, and plays in the singles semis against Ana Ivanovic on Thursday.

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1:59 p.m.

Top-ranked Serena Williams looks in a relaxed mood as she prepares to face former finalist Sara Errani in the French Open quarterfinals.

As they prepare to come out, Williams is wearing headphones and jogging up and down on the spot, while Errani has good reason to look pensive.

Williams, seeking to win her 20th Grand Slam title, leads the Italian 8-0 in career matches, with five of those on clay.

Errani, the 2012 runner-up, lost 6-0, 6-1 to Williams in the semifinals here two years ago.