Puig beats former champion Petkovic to reach semis
The fourth-seeded Petkovic, who won the tournament in 2011, missed chances to break in the first set and Puig capitalized to reach her first semifinal.
The German was the only seed left in the tournament, which will see a new champion.
McHale faces Silvia Soler-Espinosa of Spain, who edged Camila Giorgi of Italy 3-6, 6-4, 7-5.
Copyright 2014 by The Associated Press
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