Head to head
0
Hard
1
0
Clay
1
Luis Ayala's wins on the left · Clark Graebner's on the right · bar lengths share one scale
All meetings (2)
| 1971 | San Juan | Hard | R16 | Clark Graebner | 6-1 6-4 |
| 1969 | Indianapolis | Clay | QF | Clark Graebner | 6-1 RET |
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.