Head to head
Rivalry summary
Zan Guerry and Guillermo Vilas met 2 times on the ATP tour between 1970 and 1974. Their head-to-head is level at 1–1. By surface, they are level 1–1 on clay.
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Clay
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Zan Guerry's wins on the left · Guillermo Vilas's on the right · bar lengths share one scale
All meetings (2)
| 1974 | Houston WCT | Clay | R16 | Guillermo Vilas | 6-2 6-1 |
| 1970 | Cincinnati | Clay | R64 | Zan Guerry | 1-6 6-3 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.