Petra Kvitova of the Czech Republic  bends over as she plays Madison Keys of the U.S. during their third round match at the Australian Open tennis championship in Melbourne, Australia, Saturday, Jan. 24, 2015. (AP Photo/Lee Jin-man)

MELBOURNE, Australia (AP) — Wimbledon champion Petra Kvitova is out of the Australian Open, beaten 6-4, 7-5 by 19-year-old American Madison Keys.

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