US Open in pictures: Karolina Pliskova fights back
Catch up on the best images from the fourth day's play at Flushing Meadows as the World No.1 survived a scare.
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Karolina Pliskova was forced to work to hold onto her World No.1 ranking as she beat Nicole Gibbs (Getty)
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Kurumi Nara celebrates beating former champion Svetlana Kuznetsova (Getty)
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Eighth seed Svetlana Kuznetsova feels the strain during her surprise defeat to Kurumi Nara (Getty)
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Nao Hibino's athletic prowess was not enough against Lucie Safarova (Getty)
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CoCo Vandeweghe salutes the home crowd during her victory over Ons Jabeur (Getty)
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Yulia Putintseva displays her frustrations during defeat to Agnieszka Radwanska (Getty)
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Agnieszka Radwanska plays a graceful backhand against Yulia Putintseva (Getty)
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Elena Vesnina worked to overcome Kirsten Flipkens (Getty)
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Home favorite Madison Keys takes a breather during victory over Tatjana Maria (Getty)
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Shelby Rogers succumbs to her emotions after her marathon victory over Daria Gavrilova (Getty)
