Head to head
1
Hard
1
1
Clay
0
1
Grass
0
Jeff Borowiak's wins on the left · Erik Van Dillen's on the right · bar lengths share one scale
All meetings (4)
| 1981 | Wimbledon | Grass | R128 | Jeff Borowiak | 6-2 6-4 4-6 6-2 |
| 1977 | Basel | Hard | QF | Erik Van Dillen | 6-3 6-4 |
| 1974 | Louisville | Clay | R64 | Jeff Borowiak | 7-5 6-4 |
| 1969 | Berkeley | Hard | R32 | Jeff Borowiak | 6-4 7-9 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.