Sloane Stephens lost 6-7 (3), 6-4, 7-5 in the Linz quarters Friday.
Lintao Zhang/Getty Images

LINZ, Austria (AP) - Second-seeded Sloane Stephens of the United States was upset 6-7 (3), 6-4, 7-5 Friday by Stefanie Voegele in the quarterfinals of the Generali Ladies.

The 12th-ranked Stephens lost the last five games of the final set. Stephens also lost a 5-2 lead in the opening set before converting her ninth set point in the tiebreaker. Voegele used one break to take the second set and won the third after trailing 5-2.

The 58th-ranked Voegele will play two-time former champion Ana Ivanovic or Dominika Cibulkova in an attempt to reach her first career final.

Also, fourth-seeded Carla Suarez Navarro of Spain beat Kirsten Flipkens of Belgium 6-1, 6-3. Suarez Navarro won the first eight points of the match and held serve throughout.

She'll play either top-seeded Angelique Kerber or Patricia Mayr-Achleitner.

Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.

SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.