Head to head
Rivalry summary
Toomas Leius and Nicholas Kalogeropoulos met 2 times on the ATP tour between 1968 and 1969. Their head-to-head is level at 1–1.
All meetings (2)
| 1969 | Davis Cup EUR R1: GRE vs URS | RR | Toomas Leius | 5-7 3-6 6-4 6-2 4-0 RET | |
| 1968 | Davis Cup EUR R1: URS vs GRE | RR | Nicholas Kalogeropoulos | 8-10 6-4 6-4 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.