Knapp, Friedsam reach quarterfinals in Linz

LINZ, Austria (AP) Karin Knapp of Italy advanced to the quarterfinals of the Generali Ladies on Thursday when her opponent Magdalena Rybarikova of Slovakia retired after the opening set with a left leg injury.

After losing the set 6-3, Rybarikova asked for medical treatment but decided to quit the match after briefly speaking to the trainer.

The 59th-ranked Knapp will next play either top-seeded Eugenie Bouchard or Tsvetana Pironkova of Bulgaria.

Anna-Lena Friedsam of Germany advanced to her first career quarterfinal by routing Jana Cepelova of Slovakia 6-0, 6-4.

Friedsam didn't face a break point until serving for the match at 5-3. The 94th-ranked German lost the game before adding another break in the next to close out the win.

Friedsman's next opponent is Stefanie Voegele of Switzerland.