Serena wins again, Kerber upsets Radwanska at WTA Championships

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SI Staff | Oct 24, 2013

Serena wins again, Kerber upsets Radwanska at WTA Championships /

Serena Williams topped Petra Kvitova to clinch a spot in the WTA Championships semifinals. — Serena Williams topped Petra Kvitova to clinch a spot in the WTA Championships semifinals :: Matthew Stockman/Getty Images

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 This material may not be published, broadcast, rewritten, or redistributed.

Published Oct 24, 2013

SI Staff