Head to head
1
Hard
1
0
Grass
1
2
Carpet
1
Thomaz Koch's wins on the left · Cliff Richey's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (6)
| 1975 | Nottingham | Grass | R64 | Cliff Richey | 3-6 7-5 6-2 |
| 1971 | Salisbury | Carpet | QF | Cliff Richey | 6-2 6-2 |
| 1971 | New York | Carpet | QF | Thomaz Koch | 7-5 6-2 |
| 1970 | Los Angeles-2 | Hard | R32 | Thomaz Koch | 6-3 6-2 |
| 1969 | Los Angeles-2 | Hard | QF | Cliff Richey | 8-6 5-7 6-4 |
| 1969 | Richmond | Carpet | QF | Thomaz Koch | 8-6 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.