Play starts at 1pm unless otherwise stated

STADIUM

Starting at 2pm

Sloane STEPHENS (USA) [1] v Rebecca PETERSON (SWE)

JOHN HARRIS COURT

After 2 men's matches

Zarina DIYAS (KAZ) v Coco GAUFF (USA)

GRANDSTAND

Monica PUIG (PUR) v Allie KIICK (USA)

Kristina MLADENOVIC (FRA) v Shelby ROGERS (USA)

Sachia VICKERY (USA) v Camila GIORGI (ITA)

Hailey BAPTISTE (USA) v Madison KEYS (USA)

ZHU Lin (CHN) v Catherine McNALLY (USA)

COURT 4

After 4 men's matches

HSIEH Su-Wei (TPE) v Kirsten FLIPKENS (BEL)

COURT 5

Anna BLINKOVA (RUS) / Katerina SINIAKOVA (CZE) v HSIEH Yu-Chieh (TPE) / YOU Xiaodi (CHN)

After 1 men's match

Anna KALINSKAYA (RUS) / Miyu KATO (JPN) v Eugenie BOUCHARD (CAN) / Sofia KENIN (USA)

After 1 men's match

Jessica PEGULA (USA) / Shelby ROGERS (USA) v Elena BOGDAN (ROU) / Rosalie VAN DER HOEK (NED)

MATCH POINTS

Hsieh Su-Wei and Kirsten Flipkens have an equal head-to-head at the moment - but it's the Belgian who has the wins whenever they have met on hard courts. Hsieh's victories have both been on grass.

McNally beat Zhu 6-2, 6-2 earlier this year in Surbiton, their only previous meeting.

LOOK: From Petrova to Kuznetsova - Previous winners in Washington

Rogers won her only previous meeting with Mladenovic on a hard court; that was in New Haven three years ago, and she came out on top 6-1, 6-1.

Sloane Stephens is a former champion here, winning the trophy in 2015 by beating Anastastia Pavlyuchenkova in the final.

The American will play Peterson for the first time.