Daniel Altmaier (8), Germany, def.Geoffrey Blancaneaux, France, 6-2, 6-2.
Roman Safiullin (12), Russia, def. Filip Misolic, Austria, 6-3, 6-3.
Felipe Meligeni Alves, Brazil, def. Timofey Skatov, Kazakhstan, 6-4, 7-6.
Jordan Thompson (3), Australia, def.Tomas Machac (21), Czech Republic, 6-4, 3-6, 6-3.
Pavel Kotov (15), Russia, def. Radu Albot (11), Moldova, 6-2, 6-3.
Yosuke Watanuki (18), Japan, def. Christopher O’Connell (2), Australia, 6-4, 6-4.
Christopher Eubanks (10), United States, def.Lukas Klein, Slovakia, 6-7, 6-3, 7-6.
Benoit Paire, France, def. Thanasi Kokkinakis (6), Australia, 6-4, 4-6, 7-5.
Cristian Garin (7), Chile, def. Alejandro Tabilo, Chile, 7-6, 6-1.
Aleksandar Vukic, Australia, def.Aleksandar Kovacevic (9), United States, 6-3, 7-6.
Jan-Lennard Struff (24), Germany, def. Zhang Zhizhen (5), China, 6-4, 6-2.
Nuno Borges (1), Portugal, def. Borna Gojo (18), Croatia, 6-4, 6-7, 7-6.
Nao Hibino, Japan, def.Danka Kovinic, Montenegro, 6-3, 6-3.
Marta Kostyuk, Ukraine, katz def. Elisabetta Cocciaretto, Italy, 6-3, 6-2.
Irina-Camelia Begu, Romania, def. Alexandra Eala, Philippines, 6-2, 7-5.
Wang Xiyu, China, def.Brenda Fruhvirtova, Czech Republic, 6-0, 7-5.
Anna Kalinskaya, Russia, def. Victoria Jimenez Kasintseva, Andorra, 6-4, 6-2.
Rebecca Marino, Canada, def. Yulia Putintseva, Kazakhstan, 7-6 (4), 6-2.
Mirjam Bjorklund, Sweden, def.Jasmine Paolini, Italy, 4-6, 6-4, 6-4.
Elise Mertens, Belgium, def. Alycia Parks, United States, 6-1, 6-4.
Claire Liu, United States, def. Katerina Siniakova, Czech Republic, 3-6, 3-3, ret.
Tereza Martincova (21), Czech Republic, def.Tamara Korpatsch, Germany, 4-6, 6-4, 6-3.
Katherine Sebov, Canada, def. Linda Fruhvirtova, Czech Republic, 6-2, 4-6, 6-4.
Laura Siegemund, Germany, def. Mayar Sherif, Egypt, 6-3, 6-4.
Camila Giorgi, Italy, def.Kaia Kanepi, Estonia, 7-6 (4), 6-7 (4), 7-6 (4).
Evgeniya Rodina, Russia, def. Bernarda Pera, United States, 6-3, 6-4.
Viktoriya Tomova, Bulgaria, def. Anna-Karolina Schmiedlova (16), Slovakia, 7-5, 6-2.
Viktorija Golubic (14), Switzerland, def.Hailey Baptiste, United States, 7-6 (3), 6-1.
