Head to head
1
Hard
1
1
Clay
1
0
Carpet
1
Karl Meiler's wins on the left · Juan Gisbert Sr's on the right · bar lengths share one scale
All meetings (5)
| 1975 | Hampton | Carpet | QF | Juan Gisbert Sr | 6-3 6-2 |
| 1975 | Bahamas | Hard | SF | Karl Meiler | 6-3 6-4 |
| 1973 | Calgary | Hard | QF | Juan Gisbert Sr | 6-4 6-4 |
| 1970 | Monte-Carlo | Clay | R32 | Juan Gisbert Sr | 3-6 6-0 8-6 |
| 1968 | Berlin | Clay | R16 | Karl Meiler | 3-6 6-0 6-4 2-6 8-6 |
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.