| Kania - G.Marchetti 7:6(5) 7:5 | 2 s |
| Horansky - Musetti 3:6 4:6 | 1 s |
| Corwin - Duckworth 7:6(5) 5:7 0:6 | 2 s |
| Delbonis - Caruso 7:6(1) 6:3 | 1 s |
| Sh.Xu - Arruabarrena 5:7 7:6(7) 5:7 | 1 s |
| Talaba - Meliss 7:6(2) 6:2 | 4 s |
| Ek.Alexandrova - Krejčíková 6:1 6:3 | 1 s |
| Parry - Zarazua 2:6 6:3 2:6 | 3 s |
| Majchrzak - Kolář 4:6 4:6 | 2 s |
| Bolsova Zadoinov - Ozgen 6:2 6:3 | 2 s |
| Vekic - Kr.Plíšková 6:4 6:4 | 2 s |
| Marchenko - Fayziev 6:1 6:4 | 2 s |
| Svitolina - Bertens 6:7(6) 2:6 | 2 s |
| Nishioka - De Minaur 7:5 6:4 | 3 s |
| Gulbis - Cressy 6:3 6:3 | 2 s |
| F.Verdasco - Kamke 6:3 3:6 6:1 6:2 | 2 s |
| Branstine - H.Watson 4:6 3:6 | 2 s |
| B.Pera - Sakkari 6:7(4) 3:6 | 2 s |
| Mat.Viola - J.J.wolf 2:6 2:6 | 2 s |
| T.K.wang - Giustino 3:6 2:6 | 2 s |
| Setkic - Berankis 4:6 6:3 4:6 | 2 s |
| Tom.Paul - V.Pospisil 6:4 ret. | 2 s |