Head to head
2
Clay
0
0
Grass
1
Zan Guerry's wins on the left · Stan Smith's on the right · bar lengths share one scale
All meetings (3)
| 1977 | Washington-2 | Clay | R64 | Zan Guerry | 6-3 6-3 |
| 1969 | Houston | Clay | R16 | Zan Guerry | 6-2 9-7 |
| 1968 | South Orange | Grass | R32 | Stan Smith | 6-2 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.