Mary Lou Piatek
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Sylvia Hanika | 5 | 5 | 10 | Mar 31, 1990 | H2H |
| Betsy Nagelsen | 8 | 1 | 9 | Sep 26, 1986 | H2H |
| Anne Smith | 1 | 7 | 8 | Feb 14, 1991 | H2H |
| Martina Navratilova | 0 | 8 | 8 | Dec 2, 1984 | H2H |
| Wendy White | 4 | 2 | 6 | Feb 22, 1990 | H2H |
H2H data updated: 2026-10-28 00:00 UTC
Mary Lou Piatek vs Karen Schimper H2H: 1-0
Mary Lou Piatek holds a 1–0 lead over Karen Schimper in their WTA head-to-head. Across 1 main-draw meeting, Mary Lou Piatek leads 1–0 on hard courts. Most recently, Mary Lou Piatek won the 1987 Key Biscayne round of 128 6-2 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 Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Mary Lou Piatek | 6-2 6-4 | Karen Schimper | Match data | Feb 24, 1987* | R128 | Key Biscayne | WTA 250 | Hard |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mary Lou Piatek | — | — | — | 1,938 | 157 | 207 | 43.1% | 0 | 0 | 0 | 0 | 2 | 2 |
| Karen Schimper | — | #75 | 11 | 1,651 | 24 | 43 | 35.8% | 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.
| Mary Lou Piatek | Karen Schimper | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1978 | 0–1 | 0.0% | — | 1,499 | 0 | 0 | 1987 | 6–12 | 33.3% | #102 | 1,528 | 0 | 0 |
| 1979 | 3–5 | 37.5% | — | 1,547 | 0 | 0 | 1988 | 13–19 | 40.6% | #93 | 1,580 | 0 | 0 |
| 1980 | 20–13 | 60.6% | — | 1,762 | 0 | 0 | 1989 | 5–10 | 33.3% | #147 | 1,588 | 0 | 0 |
| 1981 | 30–22 | 57.7% | — | 1,874 | 0 | 1 | 1990 | 0–2 | 0.0% | #470 | 1,564 | 0 | 0 |
| 1982 | 18–21 | 46.2% | — | 1,793 | 0 | 1 | — | — | — | — | — | — | — |
| 1983 | 12–20 | 37.5% | — | 1,721 | 0 | 1 | — | — | — | — | — | — | — |
| 1984 | 18–20 | 47.4% | — | 1,704 | 0 | 2 | — | — | — | — | — | — | — |
| 1985 | 14–18 | 43.8% | — | 1,678 | 0 | 2 | — | — | — | — | — | — | — |
| 1986 | 8–15 | 34.8% | — | 1,618 | 0 | 2 | — | — | — | — | — | — | — |
| 1987 | 6–12 | 33.3% | — | 1,594 | 0 | 2 | — | — | — | — | — | — | — |
| 1988 | 6–16 | 27.3% | — | 1,542 | 0 | 2 | — | — | — | — | — | — | — |
| 1989 | 7–15 | 31.8% | — | 1,592 | 0 | 2 | — | — | — | — | — | — | — |
| 1990 | 8–11 | 42.1% | — | 1,611 | 0 | 2 | — | — | — | — | — | — | — |
| 1991 | 5–8 | 38.5% | — | 1,629 | 0 | 2 | — | — | — | — | — | — | — |
| 1992 | 1–8 | 11.1% | — | 1,560 | 0 | 2 | — | — | — | — | — | — | — |
| 1993 | 1–2 | 33.3% | — | 1,554 | 0 | 2 | — | — | — | — | — | — | — |
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.
| Mary Lou Piatek | Karen Schimper | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | ||
| 1978 | — | — | — | — | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | 1987 | 2 | 4 | 6 | 33.3% | 4 | 5 | 9 | 44.4% | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% |
| 1979 | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | 2 | 3 | 5 | 40.0% | 1988 | 7 | 10 | 17 | 41.2% | 4 | 5 | 9 | 44.4% | 2 | 3 | 5 | 40.0% | 0 | 1 | 1 | 0.0% |
| 1980 | 5 | 3 | 8 | 62.5% | 3 | 1 | 4 | 75.0% | 0 | 2 | 2 | 0.0% | 12 | 7 | 19 | 63.2% | 1989 | 2 | 3 | 5 | 40.0% | 3 | 5 | 8 | 37.5% | 0 | 2 | 2 | 0.0% | — | — | — | — |
| 1981 | 15 | 5 | 20 | 75.0% | 6 | 4 | 10 | 60.0% | 4 | 6 | 10 | 40.0% | 5 | 7 | 12 | 41.7% | 1990 | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 1982 | 4 | 5 | 9 | 44.4% | 0 | 3 | 3 | 0.0% | 1 | 2 | 3 | 33.3% | 13 | 11 | 24 | 54.2% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1983 | 5 | 6 | 11 | 45.5% | 1 | 4 | 5 | 20.0% | 0 | 2 | 2 | 0.0% | 6 | 8 | 14 | 42.9% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1984 | 9 | 8 | 17 | 52.9% | 0 | 1 | 1 | 0.0% | 5 | 6 | 11 | 45.5% | 4 | 5 | 9 | 44.4% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1985 | 7 | 11 | 18 | 38.9% | 2 | 1 | 3 | 66.7% | 1 | 2 | 3 | 33.3% | 4 | 4 | 8 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1986 | 5 | 5 | 10 | 50.0% | 0 | 2 | 2 | 0.0% | 1 | 2 | 3 | 33.3% | 2 | 6 | 8 | 25.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1987 | 3 | 5 | 8 | 37.5% | 0 | 2 | 2 | 0.0% | 0 | 2 | 2 | 0.0% | 3 | 3 | 6 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1988 | 4 | 9 | 13 | 30.8% | 1 | 4 | 5 | 20.0% | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1989 | 7 | 9 | 16 | 43.8% | 0 | 3 | 3 | 0.0% | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1990 | 4 | 5 | 9 | 44.4% | 3 | 3 | 6 | 50.0% | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1991 | 5 | 5 | 10 | 50.0% | 0 | 2 | 2 | 0.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1992 | 0 | 6 | 6 | 0.0% | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1993 | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 75 | 85 | 160 | 46.9% | 17 | 32 | 49 | 34.7% | 12 | 29 | 41 | 29.3% | 53 | 61 | 114 | 46.5% | Career | 11 | 18 | 29 | 37.9% | 11 | 16 | 27 | 40.7% | 2 | 7 | 9 | 22.2% | 0 | 2 | 2 | 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.
| Mary Lou Piatek | Karen Schimper | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 1978 | 1499 | 106.9 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | -0.11 | 1987 | 1528 | 119.5 | — | — | — | — | +26 | +54 | — | 38.6% | -0.84 | 3–5 (38%) | 3–1 (75%) | 101.8 | +0.08 |
| 1979 | 1547 | 118.3 | — | — | — | — | +98 | — | — | 42.1% | -0.89 | 1–2 (33%) | 0–1 | — | +0.12 | 1988 | 1581 | 122.8 | — | — | — | — | -34 | +31 | -18 | 38.4% | -1.12 | 7–2 (78%) | 4–2 (67%) | 108.7 | +0.46 |
| 1980 | 1763 | 137.4 | — | — | — | — | +9 | -186 | — | 57.7% | +0.61 | 4–3 (57%) | 3–0 (100%) | — | +0.65 | 1989 | 1588 | 124.2 | — | — | — | — | -21 | +37 | — | 33.3% | -1.00 | 2–1 (67%) | 1–3 (25%) | 100.5 | -1.82 |
| 1981 | 1875 | 146.3 | — | — | — | — | +65 | -198 | -301 | 56.7% | +0.48 | 8–10 (44%) | 6–5 (55%) | 100.9 | -2.75 | 1990 | 1564 | 98.7 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | -0.04 |
| 1982 | 1794 | 142.2 | — | — | — | — | +59 | -196 | -212 | 47.1% | -0.08 | 4–5 (44%) | 2–3 (40%) | 96.6 | -0.89 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1983 | 1722 | 143.9 | — | — | — | — | +55 | -87 | — | 41.3% | -0.43 | 4–7 (36%) | 0–5 (0%) | 91.3 | -4.11 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1984 | 1704 | 128.6 | — | — | — | — | -14 | — | -70 | 47.7% | -0.47 | 5–5 (50%) | 4–3 (57%) | 100.9 | -0.88 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1985 | 1678 | 113.9 | — | — | — | — | -28 | -65 | -67 | 43.1% | -0.61 | 5–3 (63%) | 1–3 (25%) | 100.7 | +1.98 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1986 | 1619 | 111.1 | — | — | — | — | +10 | — | -25 | 38.5% | -0.67 | 2–4 (33%) | 0–3 (0%) | 95.5 | +1.45 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1987 | 1595 | 117.3 | — | — | — | — | +33 | — | — | 35.7% | -0.78 | 3–3 (50%) | 0–1 | — | +0.12 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1988 | 1543 | 116.2 | — | — | — | — | +33 | -44 | — | 30.8% | -1.31 | 4–4 (50%) | 0–2 | — | -0.58 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1989 | 1593 | 121.4 | — | — | — | — | +35 | -117 | — | 31.4% | -1.65 | 5–2 (71%) | 4–2 (67%) | 107.3 | -2.73 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1990 | 1612 | 125.3 | — | — | — | — | +7 | -86 | — | 43.9% | -0.63 | 1–2 (33%) | 0–2 | — | -0.44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1991 | 1630 | 119.5 | — | — | — | — | +17 | — | — | 41.4% | -0.31 | 1–2 (33%) | 0–2 | — | -0.69 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1992 | 1560 | 101.4 | — | — | — | — | -16 | — | — | 23.8% | -2.00 | 0–3 (0%) | 0–2 | — | -0.39 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1993 | 1555 | 103.2 | — | — | — | — | -21 | — | — | 42.9% | -0.71 | 0–1 | 1–0 | — | -0.16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1938 | 136.6 | — | — | — | — | +26 | -129 | -156 | 44.3% | -0.42 | 47–56 (46%) | 21–34 (38%) | 92.7 | -2.59 | Career | 1651 | 124.0 | — | — | — | — | -18 | +41 | -18 | 36.4% | -1.08 | 12–8 (60%) | 8–6 (57%) | 108.5 | -1.97 |
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.
Karen Schimper
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Maria Lindstrom | 3 | 0 | 3 | Mar 21, 1989 | H2H |
| Gabriela Sabatini | 0 | 3 | 3 | May 26, 1988 | H2H |
| Linda Ferrando | 1 | 1 | 2 | Apr 4, 1990 | H2H |
| Kate Gompert | 1 | 1 | 2 | Feb 26, 1990 | H2H |
| Elna Reinach | 1 | 1 | 2 | May 31, 1989 | H2H |