Koji Watanabe
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Francois Jauffret | 0 | 2 | 2 | May 3, 1970 | H2H |
| Colin Dibley | 0 | 1 | 1 | Apr 2, 1972 | H2H |
| Charles Chang | 1 | 0 | 1 | Apr 1, 1972 | — |
| Ingo Buding | 0 | 1 | 1 | Jun 24, 1970 | — |
| Stepan Koudelka | 0 | 1 | 1 | Jun 17, 1970 | — |
H2H data updated: 2026-09-06 00:00 UTC
Koji Watanabe vs Keith Carpenter H2H: 0-1
Keith Carpenter holds a 1–0 lead over Koji Watanabe in their ATP head-to-head. Across 1 main-draw meeting, Keith Carpenter leads 1–0 on grass. Most recently, Keith Carpenter won the 1968 Bristol round of 32 8-6 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
0
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1
1 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Keith Carpenter | 8-6 6-4 | Koji Watanabe | Match data | Jun 13, 1968* | R32 | Bristol | ATP 250 | Grass |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Koji Watanabe | — | — | — | 1,544 | 12 | 20 | 37.5% | 0 | 0 | 0 | 0 | 0 | 0 |
| Keith Carpenter | — | — | — | 1,510 | — | — | — | 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.
| Age | Koji Watanabe | Keith Carpenter | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 26 | 1968 | 7–6 | 53.8% | — | 1,529 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 1969 | 4–10 | 28.6% | — | 1,471 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 1970 | 0–3 | 0.0% | — | 1,434 | 0 | 0 | — | — | — | — | — | — | — |
| 30 | 1972 | 1–1 | 50.0% | — | 1,445 | 0 | 0 | — | — | — | — | — | — | — |
Surface Results by Age
Seasons are aligned by the age each player spent most of that calendar year. 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.
| Age | Koji Watanabe | Keith Carpenter | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 26 | 1968 | — | — | — | — | 6 | 4 | 10 | 60.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | 1968 | 0 | 1 | 1 | 0.0% | 1 | 0 | 1 | 100.0% | 1 | 2 | 3 | 33.3% | — | — | — | — |
| 27 | 1969 | — | — | — | — | 2 | 4 | 6 | 33.3% | 2 | 6 | 8 | 25.0% | — | — | — | — | 1969 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 28 | 1970 | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | 1970 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1971 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 30 | 1972 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | 0 | 2 | 2 | 0.0% |
| 32 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1974 | — | — | — | — | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 34 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1976 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1 | 1 | 2 | 50.0% | 8 | 9 | 17 | 47.1% | 3 | 10 | 13 | 23.1% | — | — | — | — | — | 0 | 2 | 2 | 0.0% | 1 | 3 | 4 | 25.0% | 1 | 3 | 4 | 25.0% | 0 | 3 | 3 | 0.0% |
Advanced Statistics Comparison by Age
Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. 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.
| Age | Koji Watanabe | Keith Carpenter | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 26 | 1968 | 1529 | 104.9 | — | — | — | — | — | +37 | -47 | 51.5% | +0.03 | 1–3 (25%) | 1–0 | — | +0.48 | 1968 | 1510 | 100.1 | — | — | — | — | — | — | -11 | 35.7% | -1.21 | 1–0 | — | — | -0.27 |
| 27 | 1969 | 1471 | 107.4 | — | — | — | — | — | +65 | -43 | 30.8% | -1.00 | 1–1 | — | — | +0.04 | 1969 | 1502 | 104.3 | — | — | — | — | — | — | — | 0.0% | -2.33 | — | — | — | -0.18 |
| 28 | 1970 | 1435 | 99.5 | — | — | — | — | — | — | — | 11.1% | -2.22 | — | — | — | -0.08 | 1970 | 1497 | 99.9 | — | — | — | — | — | — | — | 0.0% | -4.00 | — | — | — | -0.07 |
| 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1971 | 1496 | 105.7 | — | — | — | — | — | — | — | 0.0% | -4.00 | — | — | — | -0.26 |
| 30 | 1972 | 1446 | 104.2 | — | — | — | — | — | — | — | 50.0% | +1.00 | — | — | — | +0.35 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | 1474 | 104.5 | — | — | — | — | — | — | — | 0.0% | -3.33 | — | — | — | +0.04 |
| 32 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1974 | 1474 | 106.3 | — | — | — | — | — | — | — | 0.0% | -5.00 | — | — | — | -0.22 |
| 34 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1976 | 1461 | 95.4 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | 0–1 | — | +0.16 |
| Career | — | 1545 | 106.4 | — | — | — | — | — | +48 | -44 | 37.6% | -0.64 | 2–4 (33%) | 1–0 | — | +2.55 | — | 1510 | 105.6 | — | — | — | — | — | — | -11 | 16.1% | -2.38 | 1–0 | 0–1 | — | -6.15 |
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.
Keith Carpenter
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Rod Laver | 0 | 2 | 2 | Feb 14, 1973 | — |
| Jeff Simpson | 0 | 1 | 1 | Jan 3, 1976 | — |
| Tom Okker | 0 | 1 | 1 | Feb 14, 1974 | — |
| Gerald Battrick | 0 | 1 | 1 | Oct 10, 1973 | — |
| Graham Stilwell | 0 | 1 | 1 | Aug 22, 1973 | — |