Defending champion Kim Clijsters advanced to the fourth round of the US Open on Friday by defeating Wimbledon runner-up and Czech 27th seed Petra Kvitova 6-3, 6-0 in only 62 minutes.

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The Belgian second seed, who won the last 12 games, will play for a berth in the quarter-finals against either 157th-rated French wildcard Virginie Razzano or former world number one Ana Ivanovic of Serbia.
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