Head to head
1
Hard
0
1
Clay
3
0
Carpet
2
Jan Gunnarsson's wins on the left · Heinz Gunthardt's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 1986 | Rome | Clay | R64 | Heinz Gunthardt | 7-6 6-1 |
| 1986 | Rotterdam | Carpet | R32 | Heinz Gunthardt | 6-2 6-4 |
| 1985 | Vienna | Hard | SF | Jan Gunnarsson | 7-6 6-2 |
| 1985 | Brussels | Carpet | R32 | Heinz Gunthardt | 6-3 6-3 |
| 1984 | Gstaad | Clay | R32 | Heinz Gunthardt | 6-4 7-5 |
| 1984 | Roland Garros | Clay | R32 | Jan Gunnarsson | 3-6 7-6 6-1 3-6 6-1 |
| 1979 | Bastad | Clay | R16 | Heinz Gunthardt | 6-1 7-6 |
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.