Head to head
1
Hard
1
3
Clay
0
2
Grass
0
Onny Parun's wins on the left · Dick Dell's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1974 | Bombay | Clay | QF | Onny Parun | 6-2 7-5 |
| 1974 | Los Angeles | Hard | R64 | Dick Dell | 7-6 3-6 7-5 |
| 1974 | South Orange | Grass | R32 | Onny Parun | 6-4 7-6 |
| 1974 | Houston WCT | Clay | R32 | Onny Parun | 1-6 7-6(5) 6-3 |
| 1971 | Clemmons | Clay | R32 | Onny Parun | 6-4 6-2 |
| 1970 | San Juan | Hard | R64 | Onny Parun | 4-6 16-14 6-1 |
| 1969 | Southampton | Grass | R64 | Onny Parun | 7-5 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.