By surface
| Surface | Kei Nishikori | Billy Harris |
|---|---|---|
| Hard | 1 | 0 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-01-31 | ATP | Davis Cup QLS R1: JPN vs GBR | Round Robin | Hard | Kei Nishikori | 6-2 | 6-3 |
| Surface | Kei Nishikori | Billy Harris |
|---|---|---|
| Hard | 1 | 0 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-01-31 | ATP | Davis Cup QLS R1: JPN vs GBR | Round Robin | Hard | Kei Nishikori | 6-2 | 6-3 |