Head to head
0
Clay
1
1
Carpet
0
Ron Holmberg's wins on the left · Onny Parun's on the right · bar lengths share one scale
All meetings (2)
| 1970 | Jacksonville | Clay | R16 | Onny Parun | 7-5 6-4 |
| 1969 | Macon | Carpet | R32 | Ron Holmberg | 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.