Wimbledon Champion Petra Kvitova

US Open: Wimbledon champ Kvitova out in third round

NEW YORK: Wimbledon champion Petra Kvitova was stunned in the third round of the U.S. Open by a scrambling, moon-balling qualifier ranked No. 145.   Aleksandra Krunic, a 21-year-old Serb who until this week had not