Head to head
1
Clay
0
1
Carpet
0
Paul Gerken's wins on the left · Zan Guerry's on the right · bar lengths share one scale
All meetings (2)
| 1975 | San Antonio WCT | Carpet | R16 | Paul Gerken | 6-2 6-4 |
| 1972 | Toronto-2 | Clay | R64 | Paul Gerken | 6-3 7-5 |
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.