Klaus Eberhard
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Balazs Taroczy | 1 | 3 | 4 | May 25, 1979 | H2H |
| Ismail El Shafei | 3 | 0 | 3 | Feb 26, 1982 | — |
| Bernie Mitton | 1 | 2 | 3 | Oct 21, 1981 | H2H |
| Chris Lewis | 1 | 2 | 3 | May 22, 1981 | H2H |
| Jimmy Connors | 0 | 2 | 2 | Mar 10, 1983 | H2H |
H2H data updated: 2026-09-06 00:00 UTC
Klaus Eberhard vs John Marks H2H: 0-1
John Marks holds a 1–0 lead over Klaus Eberhard in their ATP head-to-head. Across 1 main-draw meeting, John Marks leads 1–0 on grass. Most recently, John Marks won the 1977 Adelaide round of 32 6-3 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
–
1
1 main-draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| John Marks | 6-3 6-4 | Klaus Eberhard | Match data | Jan 13, 1977* | R32 | Adelaide | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Klaus Eberhard | #751 | #81 | 0 | 1,660 | 53 | 72 | 42.4% | 0 | 0 | 0 | 0 | 0 | 0 |
| John Marks | #223 | #60 | 0 | 1,632 | 30 | 81 | 27.0% | 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 | Klaus Eberhard | John Marks | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | — | — | — | — | — | — | — | 1970 | 1–1 | 50.0% | — | 1,486 | 0 | 0 |
| 18 | 1976 | 0–4 | 0.0% | #264 | 1,465 | 0 | 0 | 1971 | 1–2 | 33.3% | — | 1,471 | 0 | 0 |
| 19 | 1977 | 2–4 | 33.3% | #246 | 1,462 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 1978 | 6–7 | 46.2% | #180 | 1,543 | 0 | 0 | 1973 | 0–1 | 0.0% | — | 1,454 | 0 | 0 |
| 21 | 1979 | 9–10 | 47.4% | #199 | 1,595 | 0 | 0 | 1974 | 1–3 | 25.0% | — | 1,434 | 0 | 0 |
| 22 | 1980 | 11–14 | 44.0% | #104 | 1,587 | 0 | 0 | 1975 | 5–1 | 83.3% | #330 | 1,554 | 0 | 0 |
| 23 | 1981 | 15–17 | 46.9% | #89 | 1,583 | 0 | 0 | 1976 | 3–15 | 16.7% | #165 | 1,438 | 0 | 0 |
| 24 | 1982 | 8–12 | 40.0% | — | 1,561 | 0 | 0 | 1977 | 4–13 | 23.5% | #174 | 1,434 | 0 | 0 |
| 25 | 1983 | 0–1 | 0.0% | #208 | 1,560 | 0 | 0 | 1978 | 9–16 | 36.0% | #63 | 1,629 | 0 | 0 |
| 26 | 1984 | 0–1 | 0.0% | #278 | 1,544 | 0 | 0 | 1979 | 4–26 | 13.3% | #115 | 1,457 | 0 | 0 |
| 27 | 1985 | 2–2 | 50.0% | #279 | 1,557 | 0 | 0 | 1980 | 2–3 | 40.0% | #223 | 1,460 | 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 | Klaus Eberhard | John Marks | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1970 | — | — | — | — | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — |
| 18 | 1976 | 0 | 1 | 1 | 0.0% | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — | 1971 | — | — | — | — | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — |
| 19 | 1977 | — | — | — | — | 1 | 3 | 4 | 25.0% | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1978 | — | — | — | — | 6 | 6 | 12 | 50.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | 1973 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 21 | 1979 | 3 | 3 | 6 | 50.0% | 6 | 7 | 13 | 46.2% | — | — | — | — | — | — | — | — | 1974 | — | — | — | — | — | — | — | — | 1 | 3 | 4 | 25.0% | — | — | — | — |
| 22 | 1980 | 0 | 4 | 4 | 0.0% | 11 | 10 | 21 | 52.4% | — | — | — | — | — | — | — | — | 1975 | — | — | — | — | — | — | — | — | 5 | 1 | 6 | 83.3% | — | — | — | — |
| 23 | 1981 | 5 | 7 | 12 | 41.7% | 10 | 9 | 19 | 52.6% | 0 | 1 | 1 | 0.0% | — | — | — | — | 1976 | 1 | 6 | 7 | 14.3% | 2 | 5 | 7 | 28.6% | 0 | 4 | 4 | 0.0% | — | — | — | — |
| 24 | 1982 | 0 | 3 | 3 | 0.0% | 8 | 7 | 15 | 53.3% | — | — | — | — | 0 | 2 | 2 | 0.0% | 1977 | 0 | 2 | 2 | 0.0% | 1 | 5 | 6 | 16.7% | 3 | 6 | 9 | 33.3% | — | — | — | — |
| 25 | 1983 | — | — | — | — | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | 1978 | 0 | 2 | 2 | 0.0% | 2 | 7 | 9 | 22.2% | 7 | 6 | 13 | 53.8% | 0 | 1 | 1 | 0.0% |
| 26 | 1984 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 1979 | 1 | 5 | 6 | 16.7% | 1 | 9 | 10 | 10.0% | 2 | 8 | 10 | 20.0% | 0 | 4 | 4 | 0.0% |
| 27 | 1985 | — | — | — | — | 2 | 2 | 4 | 50.0% | — | — | — | — | — | — | — | — | 1980 | 2 | 1 | 3 | 66.7% | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| Career | — | 8 | 18 | 26 | 30.8% | 44 | 48 | 92 | 47.8% | 1 | 2 | 3 | 33.3% | 0 | 4 | 4 | 0.0% | — | 4 | 16 | 20 | 20.0% | 6 | 26 | 32 | 18.8% | 20 | 33 | 53 | 37.7% | 0 | 6 | 6 | 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 | Klaus Eberhard | John Marks | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1970 | 1486 | 100.6 | — | — | — | — | — | — | — | 0.0% | -2.00 | — | — | — | +0.07 |
| 18 | 1976 | 1466 | 103.3 | — | — | — | — | — | +41 | — | 11.1% | -2.33 | 0–1 | 1–1 | — | +0.03 | 1971 | 1471 | 103.7 | — | — | — | — | — | — | +31 | 37.5% | -0.63 | — | 1–2 (33%) | — | +0.18 |
| 19 | 1977 | 1463 | 104.8 | — | — | — | — | — | +41 | — | 33.3% | -1.17 | — | — | — | +0.66 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1978 | 1543 | 128.6 | — | — | — | — | — | +38 | — | 48.6% | -0.40 | 2–3 (40%) | 4–3 (57%) | 102.7 | +0.03 | 1973 | 1454 | — | — | — | — | — | — | — | — | — | — | — | — | — | +0.15 |
| 21 | 1979 | 1596 | 124.6 | — | — | — | — | -32 | +11 | — | 50.0% | -0.11 | 2–4 (33%) | 3–2 (60%) | 98.9 | +0.97 | 1974 | 1434 | 96.4 | — | — | — | — | — | — | +7 | 30.0% | -1.60 | 1–1 | 1–0 | — | +0.27 |
| 22 | 1980 | 1588 | 117.4 | — | — | — | — | -92 | +40 | — | 46.6% | -0.19 | 2–3 (40%) | 5–6 (45%) | 99.3 | +1.59 | 1975 | 1554 | 121.6 | — | — | — | — | — | — | +44 | 62.5% | +0.12 | 4–0 (100%) | 2–0 | — | +0.10 |
| 23 | 1981 | 1584 | 122.8 | — | — | — | — | -56 | +43 | — | 47.5% | -0.16 | 6–7 (46%) | 5–4 (56%) | 100.8 | +2.56 | 1976 | 1439 | 102.4 | — | — | — | — | +49 | +81 | +84 | 27.3% | -1.68 | 0–4 (0%) | 1–1 | — | +1.65 |
| 24 | 1982 | 1561 | 113.8 | — | — | — | — | -88 | +77 | — | 42.0% | -0.44 | 4–3 (57%) | 1–3 (25%) | 99.7 | +1.31 | 1977 | 1434 | 105.6 | — | — | — | — | — | +63 | +34 | 30.4% | -1.52 | 3–4 (43%) | 2–3 (40%) | 100.4 | +0.56 |
| 25 | 1983 | 1561 | 114.1 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | -0.26 | 1978 | 1630 | 130.5 | — | — | — | — | -206 | -118 | +65 | 35.9% | -0.81 | 3–0 (100%) | 0–6 (0%) | 101.6 | -0.89 |
| 26 | 1984 | 1545 | 97.6 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | +0.09 | 1979 | 1457 | 112.2 | — | — | — | — | -86 | -22 | +140 | 19.4% | -2.11 | 2–5 (29%) | 1–6 (14%) | 95.6 | +0.37 |
| 27 | 1985 | 1558 | 111.4 | — | — | — | — | — | +51 | — | 46.2% | -0.69 | 2–1 (67%) | 1–0 | — | -0.03 | 1980 | 1460 | 100.7 | — | — | — | — | -68 | — | — | 41.7% | -0.50 | 1–1 | — | — | +0.91 |
| Career | — | 1661 | 125.8 | — | — | — | — | -62 | +43 | — | 44.6% | -0.40 | 18–22 (45%) | 20–19 (51%) | 102.5 | +5.56 | — | 1632 | 116.6 | — | — | — | — | -59 | -11 | +67 | 30.7% | -1.37 | 14–15 (48%) | 8–18 (31%) | 101.0 | +3.06 |
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.
John Marks
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Phil Dent | 1 | 6 | 7 | Dec 28, 1979 | H2H |
| Dick Stockton | 2 | 1 | 3 | Dec 13, 1979 | H2H |
| John Sadri | 1 | 2 | 3 | Nov 15, 1979 | H2H |
| Balazs Taroczy | 1 | 2 | 3 | Aug 22, 1979 | H2H |
| Nick Saviano | 0 | 3 | 3 | Apr 19, 1979 | H2H |