Jul 31 (OPTA) - Results from the ATP World Tour 500 / WTA International, Washington Women's Singles matches on Tuesday .. 1st Round .. Rebecca Peterson (SWE) beat 1-Sloane Stephens (USA) 6-2 7-5 Camila Giorgi (ITA) beat Sachia Vickery (USA) 6-2 7-5 Zarina Diyas (KAZ) beat Cori Gauff (USA) 6-4 6-2 Jessica Pegula (USA) beat 6-Katerina Siniakova (CZE) 6-4 6-3 Lauren Davis (USA) beat Eugenie Bouchard (CAN) 6-1 6-2 8-Monica Puig (PUR) beat Allie Kiick (USA) 6-4 6-2 Anna Kalinskaya (RUS) beat Nao Hibino (JPN) 6-1 6-1 Kristina Mladenovic (FRA) beat Shelby Rogers (USA) 6-4 6-4 Hailey Baptiste (USA) beat 2-Madison Keys (USA) 7-6(4) 6-2
