| | Top level | Event type
Singles, Men – Match #4
| Date | 29 July 2021 | |
|---|---|---|
| Location | Ariake Tennis Forest Park, Ariake, Koto, Tokyo, Japan | |
| Chair Umpire | Aurélie Tourte |  FRA |
| Seed | Competitor | NOC | Sets Won | Set 1 | Set 2 | |
|---|---|---|---|---|---|---|
| – | Pablo Carreño Busta |  ESP | 2 | 6 | 7 | |
| – | Daniil Medvedev |  ROC | 0 | 2 | 6 |
| Pablo Carreño Busta | Daniil Medvedev | |
|---|---|---|
| Sets Won | 2 | 0 |
| Set 1 | 6 | 2 |
| Set 2 | 7 | 6 |
| Tie-break 2 | 7 | 5 |