Head to head
1
Hard
0
Nicholas Kalogeropoulos's wins on the left · Sidney Gordon's on the right · bar lengths share one scale
All meetings (1)
| 1971 | Johannesburg | Hard | R64 | Nicholas Kalogeropoulos | 7-6 5-7 6-2 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.