Head to head
1
Hard
0
4
Clay
1
1
Grass
0
Onny Parun's wins on the left · Karl Meiler's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1976 | Gstaad | Clay | QF | Onny Parun | 6-4 7-5 |
| 1976 | Monte-Carlo WCT | Clay | R16 | Karl Meiler | 6-3 6-3 |
| 1975 | Paris | Hard | R16 | Onny Parun | 6-4 0-6 6-1 |
| 1975 | Rome | Clay | R16 | Onny Parun | 7-6 4-6 7-5 |
| 1975 | Hamburg | Clay | R16 | Onny Parun | 6-3 6-4 |
| 1972 | Australian Open | Grass | SF | Onny Parun | 2-6 6-3 7-5 6-1 |
| 1972 | Kitzbuhel | Clay | R32 | Onny Parun | 5-7 6-2 4-6 6-3 6-0 |
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.