US Open heads into its final week.

Defending champion Sloane Stephens cruised past Elise Mertens after her 6-3 6-3 win at the Arthur Ashe Stadium. She will face 19th seed Latvian Anastasija Sevastova.

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Serena Williams was relieved to have come up tops in her fourth round match against Kaia Kanepi. Williams won 6-0 4-6 6-3.

Other results:

A. Sevastova beat E. Svitolina 6-3 1-6 6-0

K. Pliskova beat A. Barty 6-4 6-4

Mens Results:

D. Thiem beat K Anderson 7-5 6-2 7-6

R. Nadal beat N. Basilashvili 6-3 6-3 7-6 6-4

J. Isner beat M. Roanic 3-6 6-3 6-4 3-6 6-2