Head to head
2
Hard
0
1
Grass
0
Onny Parun's wins on the left · Russell Simpson's on the right · bar lengths share one scale
All meetings (3)
| 1981 | Auckland | Hard | QF | Onny Parun | 6-4 6-7 10-8 |
| 1977 | Wimbledon | Grass | R64 | Onny Parun | 9-8 6-3 6-4 |
| 1974 | Christchurch | Hard | R16 | Onny Parun | 6-1 6-4 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.