Serena Williams faces Karolina Pliskova and defending champion Sloane Stephens meets Anastasija Sevastova as the quarterfinals begin.
Carla Suárez Navarro played scintillating tennis on her 30th birthday, upsetting 2006 champion Maria Sharapova to complete the quarterfinal line-up at the US Open.
ORDER OF PLAY
ARTHUR ASHE STADIUM (starts 12 noon)
Sloane STEPHENS (USA) [3] v Anastasija SEVASTOVA (LAT) [19]
After 1 ATP match and not before 7pm
Serena WILLIAMS (USA) [17] v Karolina PLISKOVA (CZE) [8]
LOUIS ARMSTRONG STADIUM (starts 11am)
Lucie HRADECKA (CZE) / Ekaterina MAKAROVA (RUS) [6] v Timea BABOS / Kristina MLADENOVIC (FRA) [2]
After 1 ATP match
Ashleigh BARTY (AUS) / CoCo VANDEWEGHE (USA) [13] v Dalila JAKUPOVIC (SLO) / Irina KHROMACHEVA (RUS)
Christina McHALE (USA) / Christian HARRISON (USA) v Andrea SESTINI HLAVACKOVA (CZE) / Edouard ROGER-VASSELIN (FRA) [5]
GRANDSTAND (starts 11am)
After 2 Junior matches
Raluca OLARU (ROU) / Franko SKUGOR (CRO) v Alicja ROSOLSKA (POL) / Nikola METIC (CRO)
