H2H data updated: 2026-09-13 00:00 UTC

Mary Lou Piatek vs Isabelle Demongeot H2H: 1-0

Mary Lou Piatek holds a 1–0 lead over Isabelle Demongeot 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 Boca Raton round of 64 7-6 1-6 6-3.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Mary Lou Piatek
USA
H2H
1 – 0
1 main-draw meetings
Isabelle Demongeot
FRA Age 59 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mary Lou Piatek 7-6 1-6 6-3 Isabelle Demongeot #38 Match data Mar 15, 1989* R64 Boca Raton 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
Isabelle Demongeot #522 #35 69 1,841 119 157 43.1% 0 0 0 0 1 1

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 Isabelle Demongeot
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1978 0–1 0.0% — 1,499 0 0 1984 1–1 50.0% #165 1,513 0 0
1979 3–5 37.5% — 1,546 0 0 1985 4–7 36.4% #135 1,520 0 0
1980 16–12 57.1% — 1,734 0 0 1986 11–15 42.3% #65 1,608 0 0
1981 30–22 57.7% — 1,869 0 1 1987 17–20 45.9% #53 1,732 0 0
1982 18–21 46.2% — 1,791 0 1 1988 19–19 50.0% #45 1,759 0 0
1983 12–20 37.5% — 1,720 0 1 1989 18–15 54.5% #46 1,766 0 0
1984 18–20 47.4% — 1,703 0 2 1990 15–17 46.9% #78 1,687 0 0
1985 14–18 43.8% — 1,677 0 2 1991 13–14 48.1% #63 1,683 0 1
1986 8–15 34.8% — 1,618 0 2 1992 7–17 29.2% #136 1,626 0 1
1987 6–12 33.3% — 1,594 0 2 1993 5–11 31.2% #150 1,592 0 1
1988 6–16 27.3% — 1,542 0 2 1994 3–9 25.0% #130 1,541 0 1
1989 7–15 31.8% — 1,592 0 2 1995 5–9 35.7% #160 1,546 0 1
1990 8–11 42.1% — 1,611 0 2 1996 1–3 25.0% #242 1,529 0 1
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 Isabelle Demongeot
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% 1984 — — — — 1 1 2 50.0% — — — — — — — —
1979 1 1 2 50.0% 0 1 1 0.0% — — — — 2 3 5 40.0% 1985 0 1 1 0.0% 2 4 6 33.3% 2 1 3 66.7% 0 1 1 0.0%
1980 5 3 8 62.5% 3 1 4 75.0% 0 2 2 0.0% 8 6 14 57.1% 1986 3 3 6 50.0% 3 4 7 42.9% 3 2 5 60.0% 2 6 8 25.0%
1981 15 5 20 75.0% 6 4 10 60.0% 4 6 10 40.0% 5 7 12 41.7% 1987 7 8 15 46.7% 1 5 6 16.7% 6 3 9 66.7% 3 4 7 42.9%
1982 4 5 9 44.4% 0 3 3 0.0% 1 2 3 33.3% 13 11 24 54.2% 1988 5 8 13 38.5% 11 5 16 68.8% 0 3 3 0.0% 3 3 6 50.0%
1983 5 6 11 45.5% 1 4 5 20.0% 0 2 2 0.0% 6 8 14 42.9% 1989 11 9 20 55.0% 5 4 9 55.6% 2 2 4 50.0% — — — —
1984 9 8 17 52.9% 0 1 1 0.0% 5 6 11 45.5% 4 5 9 44.4% 1990 11 10 21 52.4% 4 5 9 44.4% 0 2 2 0.0% — — — —
1985 7 11 18 38.9% 2 1 3 66.7% 1 2 3 33.3% 4 4 8 50.0% 1991 10 8 18 55.6% 0 3 3 0.0% 0 1 1 0.0% 3 2 5 60.0%
1986 5 5 10 50.0% 0 2 2 0.0% 1 2 3 33.3% 2 6 8 25.0% 1992 3 11 14 21.4% 1 2 3 33.3% 2 2 4 50.0% 1 2 3 33.3%
1987 3 5 8 37.5% 0 2 2 0.0% 0 2 2 0.0% 3 3 6 50.0% 1993 4 6 10 40.0% 1 4 5 20.0% 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% 1994 2 3 5 40.0% 1 2 3 33.3% 0 2 2 0.0% 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% 1995 2 2 4 50.0% 0 3 3 0.0% 3 3 6 50.0% 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% 1996 0 1 1 0.0% 0 1 1 0.0% 1 1 2 50.0% — — — —
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 58 70 128 45.3% 30 43 73 41.1% 19 23 42 45.2% 12 21 33 36.4%

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 Isabelle Demongeot
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 1984 1514 102.8 — — — — — — — 50.0% +0.50 — — — +0.09
1979 1547 118.2 — — — — +97 — — 42.1% -0.89 1–2 (33%) 0–1 — +0.14 1985 1520 106.0 — — — — — +7 +100 36.4% -0.95 — — — +0.76
1980 1735 137.7 — — — — +8 -158 — 55.7% +0.51 3–2 (60%) 1–0 — -0.18 1986 1609 129.8 — — — — -40 -65 +53 45.8% -0.20 2–5 (29%) 2–5 (29%) 96.1 +0.38
1981 1869 146.1 — — — — +63 -192 -295 56.7% +0.48 8–10 (44%) 6–5 (55%) 101.1 -3.04 1987 1732 140.6 — — — — -56 -238 +22 45.2% -0.20 6–4 (60%) 0–1 — -0.92
1982 1792 141.6 — — — — +56 -194 -210 47.1% -0.08 4–5 (44%) 2–3 (40%) 96.7 -0.75 1988 1759 143.5 — — — — -71 -64 -55 53.9% +0.18 5–10 (33%) 4–1 (80%) 100.3 -3.79
1983 1721 143.7 — — — — +53 -86 — 41.3% -0.43 4–7 (36%) 0–5 (0%) 91.3 -3.81 1989 1766 145.5 — — — — -4 -36 -73 53.3% +0.31 5–4 (56%) 4–3 (57%) 101.0 -3.59
1984 1703 128.4 — — — — -13 — -69 47.7% -0.47 5–5 (50%) 4–3 (57%) 101.0 -0.69 1990 1688 134.0 — — — — +77 -6 — 43.5% -0.58 5–4 (56%) 3–1 (75%) 103.7 -1.98
1985 1678 113.6 — — — — -29 -65 -67 43.1% -0.61 5–3 (63%) 1–3 (25%) 100.7 +2.10 1991 1683 123.3 — — — — +67 -79 — 52.5% -0.12 2–5 (29%) 6–1 (86%) 98.5 +0.46
1986 1618 111.0 — — — — +10 — -24 38.5% -0.67 2–4 (33%) 0–3 (0%) 95.5 +1.60 1992 1626 122.8 — — — — -19 -17 +52 32.7% -0.90 1–3 (25%) 3–3 (50%) 96.6 -1.74
1987 1594 117.2 — — — — +33 — — 35.7% -0.78 3–3 (50%) 0–1 — +0.29 1993 1593 116.2 — — — — +3 -6 — 33.3% -1.23 4–3 (57%) 1–0 — -0.63
1988 1542 116.2 — — — — +33 -43 — 30.8% -1.31 4–4 (50%) 0–2 — -0.55 1994 1542 110.1 — — — — +37 +40 — 29.6% -1.11 1–2 (33%) 0–3 (0%) 95.9 +0.54
1989 1592 121.3 — — — — +35 -116 — 31.4% -1.65 5–2 (71%) 4–2 (67%) 107.3 -2.88 1995 1547 116.6 — — — — +52 -12 +36 38.7% -0.45 1–2 (33%) 0–1 — -0.04
1990 1611 125.3 — — — — +8 -85 — 43.9% -0.63 1–2 (33%) 0–2 — -0.44 1996 1530 101.6 — — — — — — — 25.0% -1.88 — 1–0 — +0.15
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 1842 138.1 — — — — +1 -50 +21 44.7% -0.34 32–42 (43%) 24–19 (56%) 99.7 -3.75

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.