| | Top level | Event type
Singles, Men – Match 1/2
| Date | 1 August 2021 | |
|---|---|---|
| Location | Ariake Tennis Forest Park, Ariake, Koto, Tokyo, Japan | |
| Chair Umpire | Alison Hughes |  GBR |
| Seed | Competitor | NOC | Sets Won | Set 1 | Set 2 | |
|---|---|---|---|---|---|---|
| – | Alexander Zverev |  GER | 2 | 6 | 6 | |
| – | Karen Khachanov |  ROC | 0 | 3 | 1 |
| Alexander Zverev | Karen Khachanov | |
|---|---|---|
| Sets Won | 2 | 0 |
| Set 1 | 6 | 3 |
| Set 2 | 6 | 1 |