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Kaia Kanepi

Serena Williams turns it on, hits 18 aces in U.S. Open victory to reach quarterfinals

Serena Williams turns it on, hits 18 aces in U.S. Open victory to reach quarterfinals

Serena Williams' yells of "Come on!" were crescendoing right along with the tension in a fourth-round U.S. Open match that began as a rout and suddenly became riveting.

When she ripped a backhand winner to claim the third set's opening game Sunday, Williams let out her loudest shout of the day, leaning forward and rocking both arms. This turned into a test, and she passed it.

Williams reached the quarterfinals at Flushing Meadows for a 10th consecutive appearance — she wasn't there last year because she gave birth to her daughter during the tournament — by picking her level up after a lull and using 18 aces to beat Kaia Kanepi of Estonia 6-0, 4-6, 6-3.

"It...

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