By surface
| Surface | Gunawan Trismuwantara | Harold Willens |
|---|---|---|
| Hard | 1 | 0 |
All meetings (1)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2013-02-07 | WTA | Fed Cup G2 RRA: HKG vs VIE | Round Robin | Hard | Katherine Ip | 4-6 | 1-6 |
| Surface | Gunawan Trismuwantara | Harold Willens |
|---|---|---|
| Hard | 1 | 0 |
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2013-02-07 | WTA | Fed Cup G2 RRA: HKG vs VIE | Round Robin | Hard | Katherine Ip | 4-6 | 1-6 |