Posted: Sat August 31, 2013 12:55PM; Updated: Sat August 31, 2013 12:55PM

Riske upsets Kvitova to advance to U.S. Open round of 16

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Alison Riske
Alison Riske reached her first Grad Slam round of 16 with a win against Petra Kvitova on Saturday.
Julio Cortez/AP

NEW YORK (AP) -- American wild card Alison Riske routed 2011 Wimbledon champion Petra Kvitova to extend her sensational summer and reach a Grand Slam round of 16 for the first time.

The 81st-ranked Riske won 6-3, 6-0 on Saturday, taking the last eight games against the seventh-seeded Czech. She was 0-5 at major tournaments before Wimbledon this year but is 5-1 since.

The 23-year-old Pittsburgh native just broke into the top 100 in late July; now she'll likely earn a top-60 ranking.

This was Riske's first victory over a top-10 opponent.

Kvitova called for a trainer before the final game. She has always struggled at Flushing Meadows, the only major tournament at which she hasn't made the semifinals. Kvitova had seven double-faults and 27 unforced errors.

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