| Date | — | |
|---|---|---|
| Location | Ariake Tennis Forest Park, Ariake, Koto, Tokyo, Japan | |
| Chair Umpire | Manuel Absolu |  FRA |
| Seed | Competitor | NOC | Sets Won | Sets Won | Set 1 | Set 2 | Set 3 | |
|---|---|---|---|---|---|---|---|---|
| – | Marin Čilić |  CRO | 2 | 2 | 6 | 7 | 7 | |
| – | João Menezes |  BRA | 1 | 1 | 7 | 5 | 6 |
| Marin Čilić | João Menezes | |
|---|---|---|
| Sets Won | 2 | 1 |
| Set 1 | 6 | 7 |
| Set 2 | 7 | 5 |
| Set 3 | 7 | 6 |
| Tie-break 1 | 5 | 7 |
| Tie-break 3 | 9 | 7 |
