Head to head
1
Hard
0
0
Clay
1
Sammy Giammalva Jr.'s wins on the left · Heinz Gunthardt's on the right · bar lengths share one scale
All meetings (2)
| 1981 | US Open | Hard | R128 | Sammy Giammalva Jr. | 6-4 4-6 6-3 1-6 6-1 |
| 1981 | Forest Hills WCT | Clay | R32 | Heinz Gunthardt | 6-3 6-2 |
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.