Top-seeded Sara Errani reaches Open GDF Suez final after Kiki Bertens retires with back pain

Kiki Bertens of the Netherlands prepares to serve to Sara Errani of Italy during the semifinal match of the 21st Gaz de France WTA Open 2013 tennis tournament at Coubertin stadium, in Paris, Saturday, Feb. 2, 2013. (AP Photo/Francois Mori) (The Associated Press)

Sara Errani of Italy returns the ball to Kiki Bertens of the Netherlands during their semifinal match at the 21st Gaz de France WTA Open 2013 tennis tournament at Coubertin stadium, in Paris, Saturday, Feb. 2, 2013. (AP Photo/Francois Mori) (The Associated Press)

PARIS – Top-seeded Sara Errani of Italy reached the Open GDF Suez final when Kiki Bertens retired from their semifinal with back pains while trailing 5-0.

The 25-year-old Errani will face the winner of the semifinal between Kristina Mladenovic of France and Mona Barthel of Germany.

The seventh-ranked Errani reached the French Open final and U.S. Open semifinals last year.

The winner of six career titles won her last title on clay at Palermo in July — her fourth title of 2012.