Head to head
2
Clay
0
Pancho J.F. Guzman's wins on the left · Ray Ruffels's on the right · bar lengths share one scale
All meetings (2)
| 1969 | Houston | Clay | R32 | Pancho J.F. Guzman | 6-8 6-1 6-2 |
| 1968 | Barranquilla | Clay | QF | Pancho J.F. Guzman | 7-9 6-3 6-2 |
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.