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: 2026-09-13 00:00 UTC
Mary Lou Piatek vs Andrea Vieira H2H: 2-0
Mary Lou Piatek holds a 2–0 lead over Andrea Vieira in their WTA head-to-head. Across 2 main-draw meetings, Mary Lou Piatek leads 1–0 on clay and 1–0 on hard courts. Most recently, Mary Lou Piatek won the 1990 Tampa round of 32 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 |
|---|---|---|---|---|---|---|---|---|
| Mary Lou Piatek | 6-4 6-2 | Andrea Vieira | Match data | Apr 19, 1990* | R32 | Tampa | Tier III → modern equivalent WTA 250 | Clay |
| Mary Lou Piatek | 6-1 6-2 | Andrea Vieira | Match data | Feb 8, 1990* | R32 | Wichita | Tier IV → modern equivalent 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 | — | — | — | 1,931 | 153 | 206 | 42.6% | 0 | 0 | 0 | 0 | 2 | 2 |
| Andrea Vieira | — | — | — | 1,631 | 28 | 55 | 33.7% | 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 | Andrea Vieira | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 1986 | 0–1 | 0.0% | — | 1,481 | 0 | 0 |
| 1979 | 3–5 | 37.5% | — | 1,546 | 0 | 0 | 1987 | 1–2 | 33.3% | — | 1,467 | 0 | 0 |
| 1980 | 16–12 | 57.1% | — | 1,734 | 0 | 0 | 1988 | 6–8 | 42.9% | — | 1,501 | 0 | 0 |
| 1981 | 30–22 | 57.7% | — | 1,869 | 0 | 1 | 1989 | 9–11 | 45.0% | — | 1,556 | 0 | 0 |
| 1982 | 18–21 | 46.2% | — | 1,791 | 0 | 1 | 1990 | 5–15 | 25.0% | — | 1,502 | 0 | 0 |
| 1983 | 12–20 | 37.5% | — | 1,720 | 0 | 1 | 1991 | 1–2 | 33.3% | — | 1,496 | 0 | 0 |
| 1984 | 18–20 | 47.4% | — | 1,703 | 0 | 2 | 1992 | 0–1 | 0.0% | — | 1,494 | 0 | 0 |
| 1985 | 14–18 | 43.8% | — | 1,677 | 0 | 2 | 1993 | 4–8 | 33.3% | — | 1,485 | 0 | 0 |
| 1986 | 8–15 | 34.8% | — | 1,618 | 0 | 2 | 1994 | 1–5 | 16.7% | — | 1,460 | 0 | 0 |
| 1987 | 6–12 | 33.3% | — | 1,594 | 0 | 2 | 1995 | 1–2 | 33.3% | — | 1,466 | 0 | 0 |
| 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% | — | 1,559 | 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 | Andrea Vieira | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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% | 1986 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 1979 | 1 | 1 | 2 | 50.0% | 0 | 1 | 1 | 0.0% | — | — | — | — | 2 | 3 | 5 | 40.0% | 1987 | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 1980 | 5 | 3 | 8 | 62.5% | 3 | 1 | 4 | 75.0% | 0 | 2 | 2 | 0.0% | 8 | 6 | 14 | 57.1% | 1988 | 3 | 1 | 4 | 75.0% | 3 | 7 | 10 | 30.0% | — | — | — | — | — | — | — | — |
| 1981 | 15 | 5 | 20 | 75.0% | 6 | 4 | 10 | 60.0% | 4 | 6 | 10 | 40.0% | 5 | 7 | 12 | 41.7% | 1989 | 0 | 2 | 2 | 0.0% | 9 | 9 | 18 | 50.0% | — | — | — | — | — | — | — | — |
| 1982 | 4 | 5 | 9 | 44.4% | 0 | 3 | 3 | 0.0% | 1 | 2 | 3 | 33.3% | 13 | 11 | 24 | 54.2% | 1990 | 1 | 2 | 3 | 33.3% | 4 | 12 | 16 | 25.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 1983 | 5 | 6 | 11 | 45.5% | 1 | 4 | 5 | 20.0% | 0 | 2 | 2 | 0.0% | 6 | 8 | 14 | 42.9% | 1991 | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 1984 | 9 | 8 | 17 | 52.9% | 0 | 1 | 1 | 0.0% | 5 | 6 | 11 | 45.5% | 4 | 5 | 9 | 44.4% | 1992 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 1985 | 7 | 11 | 18 | 38.9% | 2 | 1 | 3 | 66.7% | 1 | 2 | 3 | 33.3% | 4 | 4 | 8 | 50.0% | 1993 | 0 | 1 | 1 | 0.0% | 4 | 7 | 11 | 36.4% | — | — | — | — | — | — | — | — |
| 1986 | 5 | 5 | 10 | 50.0% | 0 | 2 | 2 | 0.0% | 1 | 2 | 3 | 33.3% | 2 | 6 | 8 | 25.0% | 1994 | 1 | 2 | 3 | 33.3% | 0 | 3 | 3 | 0.0% | — | — | — | — | — | — | — | — |
| 1987 | 3 | 5 | 8 | 37.5% | 0 | 2 | 2 | 0.0% | 0 | 2 | 2 | 0.0% | 3 | 3 | 6 | 50.0% | 1995 | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — |
| 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% | 49 | 60 | 109 | 45.0% | Career | 5 | 8 | 13 | 38.5% | 23 | 46 | 69 | 33.3% | 0 | 1 | 1 | 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 | Andrea Vieira | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 106.8 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | -0.12 | 1986 | 1481 | 99.3 | — | — | — | — | — | — | — | 33.3% | -0.33 | 0–1 | — | — | +0.23 |
| 1979 | 1547 | 118.2 | — | — | — | — | +97 | — | — | 42.1% | -0.89 | 1–2 (33%) | 0–1 | — | +0.14 | 1987 | 1467 | 92.2 | — | — | — | — | — | +28 | — | 42.9% | -1.86 | 0–1 | — | — | +0.55 |
| 1980 | 1735 | 137.7 | — | — | — | — | +8 | -158 | — | 55.7% | +0.51 | 3–2 (60%) | 1–0 | — | -0.18 | 1988 | 1502 | 105.8 | — | — | — | — | +83 | -32 | — | 43.8% | -0.38 | 2–2 (50%) | 0–2 | — | +1.31 |
| 1981 | 1869 | 146.1 | — | — | — | — | +63 | -192 | -295 | 56.7% | +0.48 | 8–10 (44%) | 6–5 (55%) | 101.1 | -3.04 | 1989 | 1556 | 120.0 | — | — | — | — | — | +51 | — | 39.5% | -0.72 | 6–1 (86%) | 0–2 | — | +0.16 |
| 1982 | 1792 | 141.6 | — | — | — | — | +56 | -194 | -210 | 47.1% | -0.08 | 4–5 (44%) | 2–3 (40%) | 96.7 | -0.75 | 1990 | 1502 | 110.0 | — | — | — | — | +46 | +8 | — | 27.9% | -1.42 | 1–2 (33%) | 0–1 | — | -0.38 |
| 1983 | 1721 | 143.7 | — | — | — | — | +53 | -86 | — | 41.3% | -0.43 | 4–7 (36%) | 0–5 (0%) | 91.3 | -3.81 | 1991 | 1496 | 98.3 | — | — | — | — | — | +8 | — | 33.3% | -2.00 | — | 1–0 | — | +0.08 |
| 1984 | 1703 | 128.4 | — | — | — | — | -13 | — | -69 | 47.7% | -0.47 | 5–5 (50%) | 4–3 (57%) | 101.0 | -0.69 | 1992 | 1494 | 105.4 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | -0.14 |
| 1985 | 1678 | 113.6 | — | — | — | — | -29 | -65 | -67 | 43.1% | -0.61 | 5–3 (63%) | 1–3 (25%) | 100.7 | +2.10 | 1993 | 1485 | 97.4 | — | — | — | — | — | +17 | — | 37.0% | -1.33 | 1–4 (20%) | 1–1 | — | +0.70 |
| 1986 | 1618 | 111.0 | — | — | — | — | +10 | — | -24 | 38.5% | -0.67 | 2–4 (33%) | 0–3 (0%) | 95.5 | +1.60 | 1994 | 1460 | 101.2 | — | — | — | — | +58 | +31 | — | 16.7% | -2.50 | — | 0–1 | — | -0.02 |
| 1987 | 1594 | 117.2 | — | — | — | — | +33 | — | — | 35.7% | -0.78 | 3–3 (50%) | 0–1 | — | +0.29 | 1995 | 1466 | 100.1 | — | — | — | — | — | +25 | — | 33.3% | -1.83 | — | — | — | -0.03 |
| 1988 | 1542 | 116.2 | — | — | — | — | +33 | -43 | — | 30.8% | -1.31 | 4–4 (50%) | 0–2 | — | -0.55 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1989 | 1592 | 121.3 | — | — | — | — | +35 | -116 | — | 31.4% | -1.65 | 5–2 (71%) | 4–2 (67%) | 107.3 | -2.88 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1990 | 1611 | 125.3 | — | — | — | — | +8 | -85 | — | 43.9% | -0.63 | 1–2 (33%) | 0–2 | — | -0.44 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1991 | 1630 | 119.4 | — | — | — | — | +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 | — | — | — | — | -22 | — | — | 42.9% | -0.71 | 0–1 | 1–0 | — | -0.16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1932 | 136.4 | — | — | — | — | +26 | -124 | -154 | 43.9% | -0.44 | 46–55 (46%) | 19–34 (36%) | 92.3 | -2.67 | Career | 1632 | 109.0 | — | — | — | — | +64 | +18 | — | 34.8% | -1.18 | 10–11 (48%) | 2–7 (22%) | 98.2 | +2.96 |
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.
Andrea Vieira
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Sandra Cecchini | 0 | 4 | 4 | Jul 13, 1990 | H2H |
| Judith Wiesner | 2 | 1 | 3 | May 26, 1995 | H2H |
| Asa Carlsson | 0 | 2 | 2 | May 19, 1994 | H2H |
| Laura Golarsa | 0 | 2 | 2 | Apr 24, 1993 | H2H |
| Silke Meier | 2 | 0 | 2 | Jul 19, 1990 | H2H |