Head to head
Rivalry summary
Kenichi Hirai and Sadao Kosugi met 1 times on the ATP tour between 1974 and 1974. Kenichi Hirai leads the head-to-head 1–0 against Sadao Kosugi.
1
Clay
0
Kenichi Hirai's wins on the left · Sadao Kosugi's on the right · bar lengths share one scale
All meetings (1)
| 1974 | Tokyo-2 | Clay | R64 | Kenichi Hirai | 6-3 6-4 |
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.