| Date | 29 July 2021 | |
|---|---|---|
| Location | Ariake Tennis Forest Park, Ariake, Koto, Tokyo, Japan | |
| Chair Umpire | Marijana Veljović |  SRB |
| Seed | Competitor | NOC | Sets Won | Sets Won | Set 1 | Set 2 | Set 3 | |
|---|---|---|---|---|---|---|---|---|
| – | Karen Khachanov |  ROC | 2 | 2 | 7 | 4 | 6 | |
| – | Ugo Humbert |  FRA | 1 | 1 | 6 | 6 | 3 |
| Karen Khachanov | Ugo Humbert | |
|---|---|---|
| Sets Won | 2 | 1 |
| Set 1 | 7 | 6 |
| Set 2 | 4 | 6 |
| Set 3 | 6 | 3 |
| Tie-break 1 | 7 | 4 |
