Head to head
0
Clay
1
1
Grass
0
1
Carpet
0
Onny Parun's wins on the left · Frank Froehling's on the right · bar lengths share one scale
All meetings (3)
| 1973 | Cincinnati | Clay | R32 | Frank Froehling | 3-6 7-6 6-0 |
| 1972 | US Open | Grass | R128 | Onny Parun | 4-6 6-4 6-3 6-2 |
| 1971 | Des Moines | Carpet | R16 | Onny Parun | 6-4 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.