Head to head
3
Hard
0
Heinz Gunthardt's wins on the left · Onny Parun's on the right · bar lengths share one scale
All meetings (3)
| 1980 | US Open | Hard | R128 | Heinz Gunthardt | 6-4 6-2 6-3 |
| 1979 | Cologne | Hard | R32 | Heinz Gunthardt | 6-2 6-2 |
| 1978 | Johannesburg-2 | Hard | R16 | Heinz Gunthardt | 6-1 6-3 |
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.