H2H data updated: 2026-07-18 14:16 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 Gstaad third round 1-0 RET.
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JPN
Age 84
Right-Handed
H2H
1
–
0
1 main draw meetings
ITA
Right-Handed
H2H Match Log
| Date | Tournament | Category | Round | Surface | Winner | Score | Loser | Match |
|---|---|---|---|---|---|---|---|---|
| Jul 24, 1968* | Gstaad | ATP 250 | R32 | Clay | Koji Watanabe | 1-0 (ret.) | Giuseppe Merlo | Match data |
* Estimated match date where the exact historical date is unavailable.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 | Finals | 500 | 250 | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Koji Watanabe | #1,376 | #1,182 | 3 | 1,542 | 11 | 19 | 36.7% | 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 | 6–5 | 54.5% | — | 1,523 | 0 | 0 | — | — | — | — | — | — | — |
| 27 | 1969 | 4–10 | 28.6% | — | 1,482 | 0 | 0 | — | — | — | — | — | — | — |
| 28 | 1970 | 0–3 | 0.0% | — | 1,445 | 0 | 0 | — | — | — | — | — | — | — |
| 30 | 1972 | 1–1 | 50.0% | — | 1,456 | 0 | 0 | — | — | — | — | — | — | — |
| 40 | — | — | — | — | — | — | — | 1968 | 7–10 | 41.2% | — | 1,470 | 0 | 0 |
| 41 | — | — | — | — | — | — | — | 1969 | 1–2 | 33.3% | — | 1,452 | 0 | 0 |
| 42 | — | — | — | — | — | — | — | 1970 | 0–1 | 0.0% | — | 1,438 | 0 | 0 |
| 44 | — | — | — | — | — | — | — | 1972 | 1–1 | 50.0% | — | 1,456 | 0 | 0 |
| 45 | — | — | — | — | — | — | — | 1973 | 1–1 | 50.0% | #177 | 1,470 | 0 | 0 |