Head to head
0
Hard
1
1
Clay
0
Russell Simpson's wins on the left · Gene Mayer's on the right · bar lengths share one scale
All meetings (2)
| 1983 | Rotterdam | Hard | R16 | Gene Mayer | 6-0 6-3 |
| 1977 | Boston | Clay | R64 | Russell Simpson | 6-2 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.