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: 2026-09-03 00:00 UTC
Koji Watanabe vs Giuseppe Merlo H2H: 1-0
Koji Watanabe holds a 1–0 lead over Giuseppe Merlo in their ATP head-to-head. Across 1 main-draw meeting, Koji Watanabe leads 1–0 on clay. Most recently, Koji Watanabe won the 1968 Swiss Open Gstaad round of 32 1-0 RET.
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 |
|---|---|---|---|---|---|---|---|---|
| Koji Watanabe | 1-0 (ret.) | Giuseppe Merlo | Match data | Jul 24, 1968* | R32 | Swiss Open Gstaad | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Koji Watanabe | — | — | — | 1,544 | 12 | 20 | 37.5% | 0 | 0 | 0 | 0 | 0 | 0 |
| Giuseppe Merlo | #185 | #158 | 0 | 1,540 | 10 | 15 | 40.0% | 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.
| Age | Koji Watanabe | Giuseppe Merlo | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — | — | — | — | — | — |
| 40 | — | — | — | — | — | — | — | 1968 | 7–10 | 41.2% | — | 1,484 | 0 | 0 |
| 41 | — | — | — | — | — | — | — | 1969 | 1–2 | 33.3% | — | 1,464 | 0 | 0 |
| 42 | — | — | — | — | — | — | — | 1970 | 0–1 | 0.0% | — | 1,449 | 0 | 0 |
| 44 | — | — | — | — | — | — | — | 1972 | 1–1 | 50.0% | — | 1,467 | 0 | 0 |
| 45 | — | — | — | — | — | — | — | 1973 | 1–1 | 50.0% | #177 | 1,481 | 0 | 0 |
Advanced Statistics Comparison by Age
Seasons are aligned by the age each player spent most of that calendar year. 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.
| Age | Koji Watanabe | Giuseppe Merlo | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 27 | 1969 | 1471 | 107.4 | — | — | — | — | — | +65 | -43 | 30.8% | -1.00 | 1–1 | — | — | +0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 28 | 1970 | 1435 | 99.5 | — | — | — | — | — | — | — | 11.1% | -2.22 | — | — | — | -0.08 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 30 | 1972 | 1446 | 104.2 | — | — | — | — | — | — | — | 50.0% | +1.00 | — | — | — | +0.35 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 40 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1968 | 1484 | 103.1 | — | — | — | — | — | +21 | — | 46.2% | -0.28 | 3–2 (60%) | — | — | -0.02 |
| 41 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1969 | 1464 | 96.5 | — | — | — | — | — | +18 | — | 40.0% | -0.40 | 1–1 | — | — | +0.10 |
| 42 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1970 | 1450 | 98.0 | — | — | — | — | — | — | — | 33.3% | -2.00 | 0–1 | — | — | +0.16 |
| 44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1972 | 1468 | 101.9 | — | — | — | — | — | — | — | 50.0% | -0.75 | — | — | — | -0.10 |
| 45 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | 1481 | 97.2 | — | — | — | — | — | — | — | 40.0% | -1.40 | 1–0 | — | — | +0.06 |
| Career | — | 1545 | 106.4 | — | — | — | — | — | +48 | -44 | 37.6% | -0.64 | 2–4 (33%) | 1–0 | — | +2.55 | — | 1540 | 100.0 | — | — | — | — | — | +21 | — | 44.3% | -0.51 | 5–4 (56%) | — | — | +0.83 |
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.
Giuseppe Merlo
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Gerald Battrick | 1 | 1 | 2 | Apr 26, 1972 | H2H |
| Pierre Barthes | 0 | 1 | 1 | Jun 4, 1973 | H2H |
| John Paish | 1 | 0 | 1 | Jun 3, 1973 | H2H |
| Andrew Pattison | 0 | 1 | 1 | Apr 27, 1972 | — |
| Patricio Rodriguez Chi | 0 | 1 | 1 | Jul 21, 1970 | — |