Isao Watanabe
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Jurgen Fassbender | 0 | 1 | 1 | Oct 16, 1974 | H2H |
| Ian Fletcher | 1 | 0 | 1 | Oct 15, 1974 | H2H |
| Tito Vazquez | 0 | 1 | 1 | Apr 11, 1974 | — |
| Alex Kurucz | 0 | 1 | 1 | Aug 15, 1968 | — |
| Jan Kodes | 0 | 1 | 1 | Jul 26, 1968 | H2H |
H2H data updated: 2026-09-08 00:00 UTC
Isao Watanabe vs Hans Hartoch H2H: 1-0
Isao Watanabe holds a 1–0 lead over Hans Hartoch in their ATP head-to-head. Across 1 main-draw meeting, Isao Watanabe leads 1–0 on clay. Most recently, Isao Watanabe won the 1968 Dutch Open round of 64 6-4 6-1.
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 |
|---|---|---|---|---|---|---|---|---|
| Isao Watanabe | 6-4 6-1 | Hans Hartoch | Match data | Jul 24, 1968* | R64 | Dutch Open | ATP 250 | Clay |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Isao Watanabe | #330 | #274 | 0 | 1,517 | 5 | 8 | 38.5% | 0 | 0 | 0 | 0 | 0 | 0 |
| Hans Hartoch | — | — | — | 1,500 | — | — | — | 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.
| Isao Watanabe | Hans Hartoch | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1968 | 4–6 | 40.0% | — | 1,479 | 0 | 0 | — | — | — | — | — | — | — |
| 1974 | 1–2 | 33.3% | #274 | 1,458 | 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.
| Isao Watanabe | Hans Hartoch | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Yr | Hard | Clay | Grass | ||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | ||
| 1968 | — | — | — | — | 3 | 5 | 8 | 37.5% | 1 | 1 | 2 | 50.0% | 1968 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 1974 | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1 | 1 | 2 | 50.0% | 3 | 6 | 9 | 33.3% | 1 | 1 | 2 | 50.0% | 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 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.
| Isao Watanabe | Hans Hartoch | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 1968 | 1479 | 100.2 | — | — | — | — | — | +2 | — | 45.5% | -0.27 | 1–2 (33%) | — | — | +0.33 | 1968 | 1484 | 96.4 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | +0.03 |
| 1974 | 1459 | 97.5 | — | — | — | — | — | — | — | 20.0% | -2.80 | 0–1 | — | — | +0.19 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1518 | 99.2 | — | — | — | — | — | +2 | — | 40.7% | -0.74 | 1–3 (25%) | — | — | +4.73 | Career | 1500 | 98.1 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | +3.00 |
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.
Hans Hartoch
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Isao Watanabe | 0 | 1 | 1 | Jul 24, 1968 | — |