Washington 2018: Tuesday's Order of Play and Match Points

Play starts at 2pm local time unless otherwise stated
STADIUM
Starting at 2.30pm
[WC] Bethanie MATTEK-SANDS (USA) v Sloane STEPHENS (USA) [2]
JOHN A HARRIS GRANDSTAND
Naomi OSAKA (JPN) [3] v Bernarda PERA (USA)
After 3 ATP matches
Caroline WOZNIACKI (DEN) [1] v [Q] Anhelina KALININA (UKR)
GRANDSTAND 2
Yulia PUTINTSEVA (KAZ) [8] v Tatjana MARIA (GER)
After 2 ATP matches
[WC] Katie SWAN (GBR) v ZHENG Saisai (CHN)
Jennifer BRADY (USA) v Natalia VIKHLYANTSEVA (RUS)
MATCH COURT 1
Ana BOGDAN (ROU) v Ekaterina MAKAROVA (RUS) [4]
Belinda BENCIC (SUI) [6] v [WC] Harriet DART (GBR) - tbf, 7-5, 4-2
After 3 ATP matches
Magda LINETTE (POL) v Olivia ROGOWSKA (AUS)
MATCH COURT 2
Nao HIBINO (JPN) v [Q] Sofya ZHUK (RUS)
After 1 ATP match
Harriet DART (GBR) / Prarthana THOMBARE (IND) v Alexa GUARACHI (CHI) / Erin ROUTLIFFE (NZL) [4]
Louisa CHIRICO (USA) / Allie KIICK (USA) v [WC] Alana SMITH (USA) / Natasha SUBHASH (USA)
MATCH COURT 3
Caroline DOLEHIDE (USA) v Donna VEKIC (CRO) [7]
Francesca DI LORENZO (USA) / Jamie LOEB (USA) v Shuko AOYAMA (JPN) / Renata VORACOVA (CZE) [2]
CHAN Hao-Ching (TPE) / YANG Zhaoxuan (CHN) [1] v Sophie CHANG (USA) / Alexandra MUELLER (USA)
[WC] Nicole HAMMOND (USA) / Kristyna NEPIVODOVA (CZE) v Kristie AHN (USA) / Lauren DAVIS (USA)
MATCH POINTS
Two former champions are in action today - defending titlist Ekaterina Makarova, who beat Julia Goerges in last year's final, and 2015 winner Sloane Stephens, who beat Anastasia Pavlyuchenkova to lift the trophy.
LOOK: From Petrova to Makarova - previous winners in Washington
Bethanie Mattek-Sands is the oldest singles player in the main draw, at the age of 33.
Third seed Naomi Osaka makes her debut in the main draw here.
Nineteen-year-old Caroline Dolehide is playing her first WTA main draw as a direct entrant.
Yulia Putintseva and Tatjana Maria have played each other four times before - but each encounter has been on clay. They have two wins apiece in the head-to-head.
Similarly, Mattek-Sands and Stephens have played each other five times before, stretching back over six years, and each time the clash has been on clay. The US Open champion leads the head-to-head by some margin, though - 4-1.