H2H data updated: 2026-10-28 00:00 UTC

Mary Lou Piatek vs Kathy Horvath H2H: 3-0

Mary Lou Piatek holds a 3–0 lead over Kathy Horvath in their WTA head-to-head. Across 3 main-draw meetings, Mary Lou Piatek leads 2–0 on hard courts and 1–0 on carpet. Most recently, Mary Lou Piatek won the 1985 Tampa round of 32 6-3 6-1.

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Mary Lou Piatek
USA
H2H
3 – 0
3 main-draw meetings
Kathy Horvath
USA Age 61 Right-Handed 170 cm / 5'7"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mary Lou Piatek 6-3 6-1 Kathy Horvath Match data Nov 7, 1985* R32 Tampa WTA 250 Hard
Mary Lou Piatek 6-4 4-6 6-4 Kathy Horvath Match data Sep 26, 1985* R32 New Orleans WTA 250 Carpet
Mary Lou Piatek 6-0 6-3 Kathy Horvath Match data Nov 14, 1980* R16 Tampa 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
Kathy Horvath — #10 24 1,976 187 155 54.7% 0 0 0 0 7 7

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 Kathy Horvath
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1978 0–1 0.0% — 1,499 0 0 1979 0–2 0.0% — 1,496 0 0
1979 3–5 37.5% — 1,547 0 0 1980 6–7 46.2% — 1,565 0 0
1980 20–13 60.6% — 1,762 0 0 1981 34–23 59.6% — 1,860 0 2
1981 30–22 57.7% — 1,874 0 1 1982 15–17 46.9% — 1,776 0 2
1982 18–21 46.2% — 1,793 0 1 1983 39–18 68.4% — 1,931 0 4
1983 12–20 37.5% — 1,721 0 1 1984 25–19 56.8% #29 1,800 0 4
1984 18–20 47.4% — 1,704 0 2 1985 23–16 59.0% — 1,776 0 6
1985 14–18 43.8% — 1,678 0 2 1986 16–15 51.6% #47 1,740 0 6
1986 8–15 34.8% — 1,618 0 2 1987 18–15 54.5% #37 1,714 0 7
1987 6–12 33.3% — 1,594 0 2 1988 9–15 37.5% #85 1,603 0 7
1988 6–16 27.3% — 1,542 0 2 1989 2–8 20.0% #224 1,529 0 7
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 Kathy Horvath
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% 1979 0 2 2 0.0% — — — — — — — — — — — —
1979 1 1 2 50.0% 0 1 1 0.0% — — — — 2 3 5 40.0% 1980 5 4 9 55.6% 1 3 4 25.0% — — — — — — — —
1980 5 3 8 62.5% 3 1 4 75.0% 0 2 2 0.0% 12 7 19 63.2% 1981 7 4 11 63.6% 15 8 23 65.2% — — — — 12 11 23 52.2%
1981 15 5 20 75.0% 6 4 10 60.0% 4 6 10 40.0% 5 7 12 41.7% 1982 0 2 2 0.0% 13 6 19 68.4% 0 2 2 0.0% 2 7 9 22.2%
1982 4 5 9 44.4% 0 3 3 0.0% 1 2 3 33.3% 13 11 24 54.2% 1983 9 4 13 69.2% 21 11 32 65.6% — — — — 9 3 12 75.0%
1983 5 6 11 45.5% 1 4 5 20.0% 0 2 2 0.0% 6 8 14 42.9% 1984 0 5 5 0.0% 21 9 30 70.0% 1 1 2 50.0% 3 4 7 42.9%
1984 9 8 17 52.9% 0 1 1 0.0% 5 6 11 45.5% 4 5 9 44.4% 1985 6 5 11 54.5% 17 7 24 70.8% — — — — 0 4 4 0.0%
1985 7 11 18 38.9% 2 1 3 66.7% 1 2 3 33.3% 4 4 8 50.0% 1986 8 7 15 53.3% 4 4 8 50.0% 2 1 3 66.7% 2 3 5 40.0%
1986 5 5 10 50.0% 0 2 2 0.0% 1 2 3 33.3% 2 6 8 25.0% 1987 6 6 12 50.0% 12 8 20 60.0% 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% 1988 2 5 7 28.6% 7 9 16 43.8% 0 1 1 0.0% — — — —
1988 4 9 13 30.8% 1 4 5 20.0% 0 1 1 0.0% 1 2 3 33.3% 1989 2 6 8 25.0% 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% — — — — — — — — — — — — — — — — —
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 45 50 95 47.4% 111 67 178 62.4% 3 6 9 33.3% 28 32 60 46.7%

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 Kathy Horvath
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 1979 1497 113.4 — — — — — — — 20.0% -2.20 0–1 0–1 — -0.25
1979 1547 118.3 — — — — +98 — — 42.1% -0.89 1–2 (33%) 0–1 — +0.12 1980 1565 110.9 — — — — +47 -65 — 43.3% -0.37 3–1 (75%) 1–3 (25%) 101.9 -0.11
1980 1763 137.4 — — — — +9 -186 — 57.7% +0.61 4–3 (57%) 3–0 (100%) — +0.65 1981 1860 146.7 — — — — -39 -79 — 55.9% +0.43 12–7 (63%) 7–5 (58%) 109.3 +0.11
1981 1875 146.3 — — — — +65 -198 -301 56.7% +0.48 8–10 (44%) 6–5 (55%) 100.9 -2.75 1982 1776 143.4 — — — — -40 +61 — 52.9% +0.46 1–7 (13%) 2–3 (40%) 92.6 -3.75
1982 1794 142.2 — — — — +59 -196 -212 47.1% -0.08 4–5 (44%) 2–3 (40%) 96.6 -0.89 1983 1931 149.2 — — — — -63 +56 — 63.7% +0.74 9–3 (75%) 11–6 (65%) 109.3 +1.20
1983 1722 143.9 — — — — +55 -87 — 41.3% -0.43 4–7 (36%) 0–5 (0%) 91.3 -4.11 1984 1800 146.8 — — — — -83 +207 — 56.1% +0.43 5–5 (50%) 3–7 (30%) 94.7 +0.22
1984 1704 128.6 — — — — -14 — -70 47.7% -0.47 5–5 (50%) 4–3 (57%) 100.9 -0.88 1985 1776 138.1 — — — — -111 +221 — 55.8% +0.24 6–2 (75%) 5–2 (71%) 104.1 -0.66
1985 1678 113.9 — — — — -28 -65 -67 43.1% -0.61 5–3 (63%) 1–3 (25%) 100.7 +1.98 1986 1740 130.5 — — — — -74 +185 -139 48.6% -0.18 7–3 (70%) 3–3 (50%) 104.3 -1.03
1986 1619 111.1 — — — — +10 — -25 38.5% -0.67 2–4 (33%) 0–3 (0%) 95.5 +1.45 1987 1714 126.0 — — — — -42 +149 — 54.1% +0.18 6–4 (60%) 3–2 (60%) 101.2 +3.31
1987 1595 117.3 — — — — +33 — — 35.7% -0.78 3–3 (50%) 0–1 — +0.12 1988 1603 116.3 — — — — +8 +113 — 41.5% -0.64 1–4 (20%) 2–2 (50%) 94.3 +0.35
1988 1543 116.2 — — — — +33 -44 — 30.8% -1.31 4–4 (50%) 0–2 — -0.58 1989 1530 101.0 — — — — +18 — — 33.3% -1.38 0–3 (0%) 2–2 (50%) 95.4 +0.25
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 1976 144.1 — — — — -48 +106 -139 53.7% +0.21 50–40 (56%) 39–36 (52%) 103.7 -0.11

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.