| Date | 28 July 2021 | |
|---|---|---|
| Location | Ariake Tennis Forest Park, Ariake, Koto, Tokyo, Japan | |
| Chair Umpire | James Keothavong |  GBR |
| Competitor | NOC | Sets Won | Sets Won | Set 1 | Set 2 | |
|---|---|---|---|---|---|---|
| Kei Nishikori |  JPN | 2 | 2 | 7 (9) | 6 | |
| Illia Ivashka |  BLR | 0 | 0 | 6 (7) | 0 |
| Kei Nishikori | Illia Ivashka | |
|---|---|---|
| Sets Won | 2 | 0 |
| Set 1 | 7 (9) | 6 (7) |
| Set 2 | 6 | 0 |
