   Luxembourg |
sets | 1 | 2 | 3 | 4 | 5 | |||
| 20:00 1/2 |
Monica Puig  |
1 | 6 | 3 | 0 | ||||
| Elise Mertens [5] | 0 | 2 | 3 | 0 | |||||
   Cali Challenger |
sets | 1 | 2 | 3 | 4 | 5 | |||
| 21:00 1/2 |
Gerald Melzer [5] | 0 | 1 | 0 | |||||
Federico Delbonis [2]  |
0 | 3 | 0 | ||||||
 Antwerp |
sets | 1 | 2 | 3 | 4 | 5 | |||
| 19:00 1/4 |
David Goffin [1] | 1 | 6 | 6 | 4 | 15 | |||
| Stefanos Tsitsipas [q] |
1 | 2 | 71 | 5 | 15 | ||||
 Stockholm |
sets | 1 | 2 | 3 | 4 | 5 | |||
| 20:00 1/4 |
Fernando Verdasco [8] | 0 | 6 | 6 | |||||
| Kevin Anderson [2] |
0 | 6 | 1 | ||||||
  Las Vegas Challenger |
sets | 1 | 2 | 3 | 4 | 5 | |||
| 19:00 1/4 |
Stefan Kozlov [4] | 2 | 6 | 6 | |||||
| Kevin King | 0 | 2 | 3 | ||||||
| 21:00 1/4 |
Reilly Opelka [8] |
0 | 1 | 15 | |||||
| Liam Broady | 0 | 1 | 30 | ||||||