Head to head
1
Clay
1
Jeff Borowiak's wins on the left · Willem Prinsloo's on the right · bar lengths share one scale
All meetings (2)
| 1977 | US Open | Clay | R128 | Willem Prinsloo | 3-6 7-6 6-1 |
| 1977 | Gstaad | Clay | R32 | Jeff Borowiak | 6-1 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.