| Flink - L.Zhu 4:6 2:6 | 2 s |
| A.Sharma - N.Stojanovic 6:4 6:4 | 2 s |
| B.Lock - Shimabukuro 6:4 6:7(5) 6:2 | 1 s |
| Lamasine - Bemelmans 4:6 7:6(2) 3:6 | 3 s |
| Fatic - Doumbia 4:6 6:7(4) | 1 s |
| L.Harris - Fabbiano 5:7 6:4 6:3 | 3 s |
| Savinykh - Frech 1:6 2:6 | 2 s |
| V.Orlov - Prabodh 6:2 6:2 | 2 s |
| Alex.Popyrin - Ivashka 1:6 6:3 4:6 | 2 s |
| Isner - J.Thompson 6:7(2) 7:6(3) 3:6 | 5 s |
| Safwat - G.Lomakin 6:2 6:4 | 1 s |
| D.Schwartzman - Djere 6:1 1:6 6:2 | 2 s |
| Safwat - Coppejans 4:6 6:4 6:3 | 4 s |
| G.Oliveira - Rybakov 6:7(6) 6:3 6:4 | 3 s |
| Cozbinov - Istomin 2:6 2:6 | 2 s |
| J.J.wolf - Bellucci 3:6 4:6 | 4 s |
| S.Kenin - Ostapenko 3:6 6:2 2:6 | 4 s |
| Van Uytvanck - Rybakina 7:5 2:6 6:7(8) | 3 s |
| Gengel - Kopřiva 4:6 3:6 | 3 s |
| E.Mertens - Putintseva 6:4 3:6 2:6 | 6 s |
| Haerteis - Stebe 4:6 1:6 | 6 s |
| Bara - Shinikova 7:6(5) 6:3 | 4 s |
| B.Schnur - Koepfer 4:6 3:6 | 2 s |
| Safiullin - Bourgue 6:2 1:6 7:5 | 3 s |
| De.Novak - M.Cuevas 6:2 6:4 | 2 s |
| Lacko - Halys 6:7(2) 2:6 | 3 s |
| Horansky - Gaio 6:3 7:5 | 4 s |
| Jabeur - Brady 6:4 6:3 | 7 s |
| O.J.gutierrez - C.Altamirano 3:6 4:6 | 3 s |
| C.Burel - Teichmann 4:6 3:6 | 2 s |
| Toledo Bague - B.Tomic 1:6 3:6 | 2 s |
| Struff - Basilashvili 6:1 6:0 | 3 s |
| Clezar - Ramanathan 7:6(5) 4:6 6:4 | 1 s |
| Isner - M.Zverev 6:3 7:6(4) | 3 s |
| J.A.hernandez - Giron 5:7 1:6 | 2 s |
| Krstin - Marcora 2:6 3:6 | 2 s |
| Herbert - Goffin 4:6 6:7(5) | 2 s |
| Soeda - B.Tomic 6:2 6:1 | 5 s |
| F.Baldi - Travaglia 2:6 1:6 | 3 s |
| Nishioka - Opelka 5:7 7:6(4) 2:6 | 5 s |
| S.Kuznetsova - Swiatek 6:2 6:2 | 3 s |
| V.Lepchenko - Kiick 7:5 6:4 | 2 s |
| C.Ruud - Londero 4:6 7:5 6:1 | 2 s |
| Delbonis - Caruso 7:6(1) 6:3 | 3 s |
| Bolt - Auger Aliassime 3:6 6:7(5) | 2 s |
| D.E.galan - Tom.Paul 2:6 4:6 | 2 s |
| E.King - Eubanks 0:6 4:6 | 4 s |