Head to head
1
Clay
0
1
Carpet
0
Heinz Gunthardt's wins on the left · Haroon Ismail's on the right · bar lengths share one scale
All meetings (2)
| 1985 | Davis Cup EUR QF: SUI vs ZIM | Clay | RR | Heinz Gunthardt | 6-0 6-1 6-1 |
| 1982 | Dortmund WCT | Carpet | R32 | Heinz Gunthardt | 3-6 6-3 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.