Head to head
1
Hard
1
1
Clay
0
2
Carpet
1
Buster C. Mottram'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 (6)
| 1981 | Monte-Carlo | Clay | R32 | Buster C. Mottram | 6-2 6-0 |
| 1980 | US Open | Hard | R64 | Buster C. Mottram | 7-6 6-2 6-4 |
| 1980 | Frankfurt WCT | Carpet | R16 | Heinz Gunthardt | 6-2 2-6 6-2 |
| 1979 | Johannesburg-2 | Hard | R16 | Heinz Gunthardt | 4-6 6-4 6-3 |
| 1979 | Memphis | Carpet | R32 | Buster C. Mottram | 7-6 6-7 6-2 |
| 1979 | Philadelphia WCT | Carpet | R64 | Buster C. Mottram | 3-6 7-6 6-1 |
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.