Time Zone – GMT-5 (America/New_York)
| 1 | Tsitsipas S. (1) | Bye | |
| 2 | Huesler M. (WC) | Medjedovic H. | 1 : 2 |
| 3 | Thiem D. | Varillas J. P. (Q) | 1 : 2 |
| 4 | Droguet T. (Q) | Fognini F. (7) | 0 : 2 |
| 5 | Auger-Aliassime F. (3) | Bye | |
| 6 | Hanfmann Y. | Moreno De Alboran N. (LL) | 2 : 1 |
| 7 | Kopriva V. | Galan D. E. | 0 : 2 |
| 8 | Cachin P. | Berrettini M. (6) | 0 : 2 |
| 9 | Struff J-L. (5) | Ramos A. | 2 : 0 |
| 10 | Riedi L. (WC) | Barrere G. | 2 : 0 |
| 11 | Van De Zandschulp B. | Stricker D. (WC) | 2 : 0 |
| 12 | Bye | Etcheverry T. M. (4) | |
| 13 | Wawrinka S. (8) | Klein L. | 1 : 2 |
| 14 | Halys Q. (Q) | Gasquet R. | 2 : 0 |
| 15 | Heide G. (Q) | Napolitano S. | 2 : 1 |
| 16 | Bye | Humbert U. (2) |
| 1 | Tsitsipas S. (1) | Medjedovic H. | 2 : 0 |
| 2 | Varillas J. P. | Fognini F. (7) | 1 : 2 |
| 3 | Auger-Aliassime F. (3) | Hanfmann Y. | 2 : 0 |
| 4 | Galan D. E. | Berrettini M. (6) | 0 : 2 |
| 5 | Struff J-L. (5) | Riedi L. | 2 : 0 |
| 6 | Van De Zandschulp B. | Etcheverry T. M. (4) | 1 : 2 |
| 7 | Klein L. | Halys Q. | 1 : 2 |
| 8 | Heide G. | Humbert U. (2) | 2 : 1 |
| 1 | Tsitsipas S. (1) | Fognini F. (7) | 2 : 0 |
| 2 | Auger-Aliassime F. (3) | Berrettini M. (6) | 0 : 2 |
| 3 | Struff J-L. (5) | Etcheverry T. M. (4) | 2 : 1 |
| 4 | Halys Q. | Heide G. | 2 : 0 |
| 1 | Tsitsipas S. (1) | Berrettini M. (6) | 0 : 2 |
| 2 | Struff J-L. (5) | Halys Q. | 0 : 2 |
| 1 | Berrettini M. (6) | Halys Q. | 2 : 0 |
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