H2H data updated: 2026-10-29 00:00 UTC

Mary Lou Piatek vs Louise Allen H2H: 1-0

Mary Lou Piatek holds a 1–0 lead over Louise Allen 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 1989 Nashville round of 32 6-7 6-3 6-4.

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Mary Lou Piatek
USA
H2H
1 – 0
1 main-draw meetings
Louise Allen
USA Age 64

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mary Lou Piatek 6-7 6-3 6-4 Louise Allen Match data Nov 9, 1989* R32 Nashville 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
Louise Allen — — — 1,758 67 100 40.1% 0 0 0 0 3 3

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 Louise Allen
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1978 0–1 0.0% — 1,499 0 0 1980 3–2 60.0% — 1,519 0 0
1979 3–5 37.5% — 1,547 0 0 1981 6–5 54.5% — 1,539 0 0
1980 20–13 60.6% — 1,762 0 0 1982 22–5 81.5% — 1,736 0 3
1981 30–22 57.7% — 1,874 0 1 1983 3–7 30.0% — 1,706 0 3
1982 18–21 46.2% — 1,793 0 1 1984 0–1 0.0% — 1,686 0 3
1983 12–20 37.5% — 1,721 0 1 1986 0–4 0.0% — 1,612 0 3
1984 18–20 47.4% — 1,704 0 2 1987 3–8 27.3% — 1,565 0 3
1985 14–18 43.8% — 1,678 0 2 1988 5–8 38.5% — 1,584 0 3
1986 8–15 34.8% — 1,618 0 2 1989 9–15 37.5% — 1,561 0 3
1987 6–12 33.3% — 1,594 0 2 1990 2–9 18.2% — 1,492 0 3
1988 6–16 27.3% — 1,542 0 2 1991 2–8 20.0% — 1,453 0 3
1989 7–15 31.8% — 1,592 0 2 1992 10–14 41.7% — 1,576 0 3
1990 8–11 42.1% — 1,611 0 2 1993 2–14 12.5% — 1,451 0 3
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 Louise Allen
Yr HardClayGrassCarpet Yr HardClayGrassCarpet
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% 1981 0 1 1 0.0% — — — — — — — — — — — —
1979 1 1 2 50.0% 0 1 1 0.0% — — — — 2 3 5 40.0% 1982 13 4 17 76.5% 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% 1983 1 1 2 50.0% 0 3 3 0.0% 2 3 5 40.0% — — — —
1981 15 5 20 75.0% 6 4 10 60.0% 4 6 10 40.0% 5 7 12 41.7% 1984 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% 1986 0 2 2 0.0% 0 1 1 0.0% 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% 1987 1 3 4 25.0% 2 2 4 50.0% 0 1 1 0.0% 0 2 2 0.0%
1984 9 8 17 52.9% 0 1 1 0.0% 5 6 11 45.5% 4 5 9 44.4% 1988 5 7 12 41.7% — — — — — — — — 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% 1989 8 12 20 40.0% 0 1 1 0.0% 1 1 2 50.0% 0 1 1 0.0%
1986 5 5 10 50.0% 0 2 2 0.0% 1 2 3 33.3% 2 6 8 25.0% 1990 2 8 10 20.0% — — — — — — — — 0 1 1 0.0%
1987 3 5 8 37.5% 0 2 2 0.0% 0 2 2 0.0% 3 3 6 50.0% 1991 2 6 8 25.0% 0 2 2 0.0% — — — — — — — —
1988 4 9 13 30.8% 1 4 5 20.0% 0 1 1 0.0% 1 2 3 33.3% 1992 7 5 12 58.3% 1 4 5 20.0% 2 3 5 40.0% 0 2 2 0.0%
1989 7 9 16 43.8% 0 3 3 0.0% 0 2 2 0.0% 0 1 1 0.0% 1993 1 6 7 14.3% 1 2 3 33.3% 0 3 3 0.0% 0 3 3 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 40 56 96 41.7% 4 16 20 20.0% 5 12 17 29.4% 0 10 10 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 Louise Allen
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 1980 1520 102.6 — — — — — — — 60.0% +0.40 2–0 1–0 — +0.09
1979 1547 118.3 — — — — +98 — — 42.1% -0.89 1–2 (33%) 0–1 — +0.12 1981 1540 111.8 — — — — — — — 53.6% +0.64 3–3 (50%) 1–3 (25%) 98.7 -0.02
1980 1763 137.4 — — — — +9 -186 — 57.7% +0.61 4–3 (57%) 3–0 (100%) — +0.65 1982 1736 132.6 — — — — -16 — — 75.4% +2.03 5–2 (71%) 2–2 (50%) 103.9 +2.84
1981 1875 146.3 — — — — +65 -198 -301 56.7% +0.48 8–10 (44%) 6–5 (55%) 100.9 -2.75 1983 1706 117.8 — — — — — -183 -105 33.3% -1.67 0–1 1–1 — -0.85
1982 1794 142.2 — — — — +59 -196 -212 47.1% -0.08 4–5 (44%) 2–3 (40%) 96.6 -0.89 1984 1686 96.2 — — — — — — — 33.3% -2.67 0–1 — — +0.11
1983 1722 143.9 — — — — +55 -87 — 41.3% -0.43 4–7 (36%) 0–5 (0%) 91.3 -4.11 1986 1612 101.4 — — — — — — — 20.0% -1.50 0–2 0–2 — +0.35
1984 1704 128.6 — — — — -14 — -70 47.7% -0.47 5–5 (50%) 4–3 (57%) 100.9 -0.88 1987 1565 110.9 — — — — +20 -55 — 32.0% -1.28 1–2 (33%) 1–2 (33%) 97.0 +0.27
1985 1678 113.9 — — — — -28 -65 -67 43.1% -0.61 5–3 (63%) 1–3 (25%) 100.7 +1.98 1988 1584 119.4 — — — — -3 — — 45.7% -0.20 3–6 (33%) 2–2 (50%) 97.4 -0.05
1986 1619 111.1 — — — — +10 — -25 38.5% -0.67 2–4 (33%) 0–3 (0%) 95.5 +1.45 1989 1562 114.0 — — — — -24 — — 43.1% -0.66 3–7 (30%) 5–2 (71%) 100.1 +0.12
1987 1595 117.3 — — — — +33 — — 35.7% -0.78 3–3 (50%) 0–1 — +0.12 1990 1493 106.2 — — — — -19 — — 21.7% -1.39 0–1 0–3 (0%) — +0.64
1988 1543 116.2 — — — — +33 -44 — 30.8% -1.31 4–4 (50%) 0–2 — -0.58 1991 1454 100.3 — — — — -10 — — 31.8% -1.54 1–3 (25%) 1–0 — +0.75
1989 1593 121.4 — — — — +35 -117 — 31.4% -1.65 5–2 (71%) 4–2 (67%) 107.3 -2.73 1992 1577 125.0 — — — — +1 -119 -28 41.8% -0.80 4–3 (57%) 2–2 (50%) 103.6 -0.19
1990 1612 125.3 — — — — +7 -86 — 43.9% -0.63 1–2 (33%) 0–2 — -0.44 1993 1452 91.9 — — — — +19 +6 +65 20.6% -2.12 1–3 (25%) 2–3 (40%) 96.2 +0.76
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 1759 120.5 — — — — -8 -90 -36 43.6% -0.45 23–34 (40%) 18–22 (45%) 95.9 +2.89

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.