Kenichi Hirai
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Tom Gorman | 0 | 2 | 2 | Nov 3, 1976 | H2H |
| Joel Bailey | 0 | 1 | 1 | Oct 21, 1981 | H2H |
| Hank Pfister | 0 | 1 | 1 | Nov 16, 1978 | H2H |
| Terry Moor | 0 | 1 | 1 | Oct 26, 1978 | H2H |
| John Whitlinger | 0 | 1 | 1 | Nov 2, 1977 | H2H |
H2H data updated: 2026-09-04 00:00 UTC
Kenichi Hirai vs Sadao Kosugi H2H: 1-0
Kenichi Hirai holds a 1–0 lead over Sadao Kosugi in their ATP head-to-head. Across 1 main-draw meeting, Kenichi Hirai leads 1–0 on hard courts. Most recently, Kenichi Hirai won the 1974 Tokyo round of 64 6-3 6-4.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Kenichi Hirai | 6-3 6-4 | Sadao Kosugi | Match data | Oct 15, 1974* | R64 | Tokyo | ATP 250 | Hard |
Estimated match date where the exact historical date is unavailable. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Kenichi Hirai | #648 | #180 | 0 | 1,503 | 7 | 32 | 17.9% | 0 | 0 | 0 | 0 | 0 | 0 |
| Sadao Kosugi | #579 | #274 | 0 | 1,500 | 0 | 1 | 0.0% | 0 | 0 | 0 | 0 | 0 | 0 |
Career Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Kenichi Hirai | Sadao Kosugi | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1971 | 1–7 | 12.5% | — | 1,443 | 0 | 0 | 1974 | 0–1 | 0.0% | #274 | 1,480 | 0 | 0 |
| 1972 | 2–3 | 40.0% | — | 1,466 | 0 | 0 | — | — | — | — | — | — | — |
| 1973 | 1–5 | 16.7% | #226 | 1,459 | 0 | 0 | — | — | — | — | — | — | — |
| 1974 | 1–4 | 20.0% | #228 | 1,438 | 0 | 0 | — | — | — | — | — | — | — |
| 1975 | 0–4 | 0.0% | #252 | 1,413 | 0 | 0 | — | — | — | — | — | — | — |
| 1976 | 2–4 | 33.3% | #187 | 1,438 | 0 | 0 | — | — | — | — | — | — | — |
| 1977 | 0–2 | 0.0% | #220 | 1,420 | 0 | 0 | — | — | — | — | — | — | — |
| 1978 | 0–2 | 0.0% | #496 | 1,413 | 0 | 0 | — | — | — | — | — | — | — |
| 1981 | 0–1 | 0.0% | — | 1,400 | 0 | 0 | — | — | — | — | — | — | — |
Surface Results by Career Season
Rows are aligned in career order because complete birth data is unavailable. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Kenichi Hirai | Sadao Kosugi | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | ||||||||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | ||
| 1971 | 1 | 4 | 5 | 20.0% | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | 1974 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| 1972 | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1973 | 0 | 2 | 2 | 0.0% | 1 | 2 | 3 | 33.3% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1974 | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1975 | — | — | — | — | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1976 | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1977 | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1978 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1981 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 3 | 9 | 12 | 25.0% | 2 | 13 | 15 | 13.3% | 2 | 8 | 10 | 20.0% | 0 | 2 | 2 | 0.0% | Career | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
Advanced Statistics Comparison by Career Season
Rows are aligned in career order because complete birth data is unavailable. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Kenichi Hirai | Sadao Kosugi | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule |
| 1971 | 1444 | 96.8 | — | — | — | — | +64 | — | — | 11.1% | -2.11 | 1–0 | 0–2 | — | +0.42 | 1974 | 1481 | 96.4 | — | — | — | — | — | — | — | 0.0% | -2.50 | — | — | — | +0.30 |
| 1972 | 1466 | 108.1 | — | — | — | — | — | — | — | 45.5% | -0.27 | 0–1 | — | — | -0.18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1973 | 1460 | 113.9 | — | — | — | — | — | +51 | — | 31.3% | -1.13 | 0–2 | 0–1 | — | -0.37 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1974 | 1439 | 100.0 | — | — | — | — | — | — | — | 33.3% | -1.42 | 0–2 | 0–1 | — | +0.48 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1975 | 1413 | 115.4 | — | — | — | — | — | — | — | 10.0% | -2.60 | — | 0–1 | — | -0.20 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1976 | 1439 | 111.6 | — | — | — | — | — | +37 | — | 35.7% | -0.43 | — | 0–1 | — | +0.34 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1977 | 1421 | 99.6 | — | — | — | — | — | — | — | 20.0% | -2.40 | 0–1 | 0–1 | — | +0.09 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1978 | 1414 | 105.5 | — | — | — | — | — | — | — | 20.0% | -2.60 | 0–1 | — | — | -0.11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1981 | 1400 | 96.5 | — | — | — | — | — | — | — | 0.0% | -3.00 | — | — | — | +0.23 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1504 | 112.1 | — | — | — | — | +64 | +44 | — | 25.8% | -1.50 | 1–7 (13%) | 0–7 (0%) | 88.6 | +1.79 | Career | 1500 | 98.1 | — | — | — | — | — | — | — | 0.0% | -2.50 | — | — | — | +30.00 |
Career Rivalries
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
Sadao Kosugi
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Kenichi Hirai | 0 | 1 | 1 | Oct 15, 1974 | H2H |