Irina Begu - Jennifer Brady 6-3, 6-3
Ana Bogdan - Marie Bouzkova 6-4, 6-2
Jil Teichmann - Dalila Jakupovic 6-3, 6-0
Vania King (SUA) - Natalia Vikhlyantseva 7-6(4), 6-3
Rebecca Peterson (Suedia) - Anastasia Pavlyuchenkova (27) 1-6, 6-4, 6-3
Camila Giorgi - Whitney Osuigwe 6-4, 6-1
Venus Williams (16) - Svetlana Kuznetsova 6-3, 5-7, 6-3
Garbine Muguruza (12) - Shuai Zhang 6-3, 6-0
Karolina Muchova - Dayana Yastremska (Ucraina) 6-4, 6-2
Ashleigh Barty (18) - Ons Jabeur 6-1, 6-3
Karolina Pliskova (8) - Zarina Dias 6-4, 7-6(4)
Sloane Stephens (3) bat Evgeniya Rodina 6-1, 7-5
Anhelina Kalinina - Kathinka Von Deichmann 1-6, 7-6(0), 5-2 (abandon)
Barbora Strtycova (23) - Danielle Lao (SUA) 6-3, 6-4
Vera Lapko - Katerina Bondarenko 6-3, 6-3
Elise Mertens (15) - Kurumi Nara 6-2, 6-7(5), 7-5
Ekaterina Makarova - Heather Watson 6-1, 3-6, 6-3
Claire Liu - Polona Hercog 7-6(4), 1-6, 6-4
Anastasija Sevastova (19) - Donna Vekic 6-2, 2-6, 6-3
Qiang Wang - Magdaléna Rybarikova (31) 6-2, 6-2
Tatjana Maria - Agnieszka Radwanska 6-3, 6-3
Elina Svitolina (7) - Sachia Vickery 6-3, 1-6, 6-1
Julia Goerges (9) - Anna Kalinskaja 6-2, 6-7(5), 6-2
Serena Williams (17) - Magda Linette 6-4, 6-0
Victoria Azarenka - Viktoria Kuzmova 6-3, 7-5
Carina Witthoeft - Caroline Dolehide 6-3, 7-6(6)
Sofia Kenin - Madison Brengle 6-0, 4-6, 7-6(4)