John Clifton
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Torben Ulrich | 1 | 2 | 3 | Jun 28, 1972 | H2H |
| Ilie Nastase | 0 | 2 | 2 | Jun 26, 1972 | H2H |
| Bob Hewitt | 0 | 2 | 2 | Jul 13, 1971 | H2H |
| Andrew Pattison | 1 | 1 | 2 | Aug 12, 1970 | — |
| Owen Davidson | 0 | 2 | 2 | Nov 1, 1968 | H2H |
H2H data updated: 2026-09-04 00:00 UTC
John Clifton vs Tomas Jaci H2H: 1-0
John Clifton holds a 1–0 lead over Tomas Jaci in their ATP head-to-head. Across 1 main-draw meeting, John Clifton leads 1–0 on clay. Most recently, John Clifton won the 1968 Parioli round of 64 6-4 6-2.
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 |
|---|---|---|---|---|---|---|---|---|
| John Clifton | 6-4 6-2 | Tomas Jaci | Match data | Mar 27, 1968* | R64 | Parioli | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| John Clifton | #323 | #243 | 0 | 1,504 | 15 | 35 | 30.0% | 0 | 0 | 0 | 0 | 0 | 0 |
| Tomas Jaci | — | — | — | 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.
| John Clifton | Tomas Jaci | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1968 | 4–7 | 36.4% | — | 1,455 | 0 | 0 | — | — | — | — | — | — | — |
| 1969 | 3–4 | 42.9% | — | 1,480 | 0 | 0 | — | — | — | — | — | — | — |
| 1970 | 4–10 | 28.6% | — | 1,444 | 0 | 0 | — | — | — | — | — | — | — |
| 1971 | 2–7 | 22.2% | — | 1,431 | 0 | 0 | — | — | — | — | — | — | — |
| 1972 | 0–3 | 0.0% | — | 1,401 | 0 | 0 | — | — | — | — | — | — | — |
| 1973 | 0–2 | 0.0% | — | 1,385 | 0 | 0 | — | — | — | — | — | — | — |
| 1974 | 2–2 | 50.0% | #318 | 1,407 | 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.
| John Clifton | Tomas Jaci | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | ||
| 1968 | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | 2 | 2 | 4 | 50.0% | 1 | 2 | 3 | 33.3% | 1968 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 1969 | — | — | — | — | — | — | — | — | 2 | 2 | 4 | 50.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1970 | 0 | 1 | 1 | 0.0% | 2 | 5 | 7 | 28.6% | 2 | 4 | 6 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1971 | — | — | — | — | 1 | 3 | 4 | 25.0% | 1 | 4 | 5 | 20.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1972 | — | — | — | — | — | — | — | — | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1973 | — | — | — | — | — | — | — | — | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1974 | 0 | 1 | 1 | 0.0% | — | — | — | — | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 0 | 3 | 3 | 0.0% | 4 | 10 | 14 | 28.6% | 9 | 18 | 27 | 33.3% | 2 | 4 | 6 | 33.3% | 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.
| John Clifton | Tomas Jaci | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 1456 | 101.2 | — | — | — | — | +17 | +31 | +64 | 40.7% | -0.63 | 0–1 | — | — | +0.13 | 1968 | 1483 | 97.2 | — | — | — | — | — | — | — | 0.0% | -3.00 | — | — | — | +0.05 |
| 1969 | 1481 | 108.3 | — | — | — | — | +55 | — | +35 | 44.4% | -0.39 | 1–1 | — | — | +0.11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1970 | 1445 | 104.0 | — | — | — | — | — | +12 | +38 | 31.4% | -1.03 | 0–1 | — | — | +0.73 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1971 | 1431 | 106.5 | — | — | — | — | — | +13 | +46 | 20.8% | -1.88 | 1–0 | — | — | +0.18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1972 | 1402 | 99.1 | — | — | — | — | — | — | +30 | 33.3% | -2.17 | 0–2 | — | — | -0.11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1973 | 1385 | 98.6 | — | — | — | — | — | — | — | 40.0% | 0.00 | 0–1 | — | — | +0.11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1974 | 1407 | 100.6 | — | — | — | — | — | — | +15 | 55.6% | -0.22 | 0–1 | — | — | +0.46 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1505 | 105.5 | — | — | — | — | +33 | +16 | +40 | 35.5% | -0.97 | 2–7 (22%) | — | — | +3.29 | Career | 1500 | 98.5 | — | — | — | — | — | — | — | 0.0% | -3.00 | — | — | — | +5.00 |
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.
Tomas Jaci
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| John Clifton | 0 | 1 | 1 | Mar 27, 1968 | — |