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

Isabelle Demongeot vs Mareen Louie Harper H2H: 1-0

Isabelle Demongeot holds a 1–0 lead over Mareen Louie Harper in their WTA head-to-head. Across 1 main-draw meeting, Isabelle Demongeot leads 1–0 on hard courts. Most recently, Isabelle Demongeot won the 1989 Key Biscayne round of 128 6-7 6-0 6-2.

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Isabelle Demongeot
FRA Age 59 Right-Handed
H2H
1 – 0
1 main-draw meetings
Mareen Louie Harper
USA Age 66

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Isabelle Demongeot #38 6-7 6-0 6-2 Mareen Louie Harper Match data Mar 21, 1989* 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
Isabelle Demongeot #522 #35 69 1,841 119 157 43.1% 0 0 0 0 1 1
Mareen Louie Harper — — — 1,910 177 239 42.5% 0 0 0 0 2 2

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.

Age Isabelle Demongeot Mareen Louie Harper
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
13 — — — — — — — 1974 2–1 66.7% — 1,523 0 0
15 — — — — — — — 1976 1–2 33.3% — 1,521 0 0
16 — — — — — — — 1977 0–2 0.0% — 1,519 0 0
17 1984 1–1 50.0% #165 1,513 0 0 1978 7–12 36.8% — 1,588 0 0
18 1985 4–7 36.4% #135 1,520 0 0 1979 4–13 23.5% — 1,568 0 0
19 1986 11–15 42.3% #65 1,608 0 0 1980 22–23 48.9% — 1,714 0 0
20 1987 17–20 45.9% #53 1,732 0 0 1981 16–20 44.4% — 1,743 0 0
21 1988 19–19 50.0% #45 1,759 0 0 1982 9–18 33.3% — 1,654 0 0
22 1989 18–15 54.5% #46 1,766 0 0 1983 7–10 41.2% — 1,671 0 0
23 1990 15–17 46.9% #78 1,687 0 0 1984 18–17 51.4% — 1,733 0 1
24 1991 13–14 48.1% #63 1,683 0 1 1985 29–18 61.7% — 1,776 0 2
25 1992 7–17 29.2% #136 1,626 0 1 1986 12–17 41.4% — 1,679 0 2
26 1993 5–11 31.2% #150 1,592 0 1 1987 9–16 36.0% — 1,623 0 2
27 1994 3–9 25.0% #130 1,541 0 1 1988 12–17 41.4% — 1,613 0 2
28 1995 5–9 35.7% #160 1,546 0 1 1989 6–14 30.0% — 1,576 0 2
29 1996 1–3 25.0% #242 1,529 0 1 1990 10–15 40.0% — 1,590 0 2
30 — — — — — — — 1991 12–16 42.9% — 1,614 0 2
31 — — — — — — — 1992 1–7 12.5% — 1,545 0 2
33 — — — — — — — 1994 0–1 0.0% — 1,536 0 2

Surface Results by Age

Seasons are aligned by the age each player spent most of that calendar year. 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.

Age Isabelle Demongeot Mareen Louie Harper
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 %
13 — — — — — — — — — — — — — — — — — 1974 2 1 3 66.7% — — — — — — — — — — — —
15 — — — — — — — — — — — — — — — — — 1976 — — — — 0 1 1 0.0% 1 1 2 50.0% — — — —
16 — — — — — — — — — — — — — — — — — 1977 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0%
17 1984 — — — — 1 1 2 50.0% — — — — — — — — 1978 4 5 9 44.4% 3 3 6 50.0% — — — — 0 4 4 0.0%
18 1985 0 1 1 0.0% 2 4 6 33.3% 2 1 3 66.7% 0 1 1 0.0% 1979 2 6 8 25.0% 0 1 1 0.0% 0 1 1 0.0% 2 5 7 28.6%
19 1986 3 3 6 50.0% 3 4 7 42.9% 3 2 5 60.0% 2 6 8 25.0% 1980 7 8 15 46.7% 3 2 5 60.0% 5 2 7 71.4% 7 11 18 38.9%
20 1987 7 8 15 46.7% 1 5 6 16.7% 6 3 9 66.7% 3 4 7 42.9% 1981 5 7 12 41.7% 1 1 2 50.0% 1 2 3 33.3% 9 10 19 47.4%
21 1988 5 8 13 38.5% 11 5 16 68.8% 0 3 3 0.0% 3 3 6 50.0% 1982 4 6 10 40.0% 2 1 3 66.7% 0 2 2 0.0% 3 9 12 25.0%
22 1989 11 9 20 55.0% 5 4 9 55.6% 2 2 4 50.0% — — — — 1983 5 5 10 50.0% — — — — — — — — 2 5 7 28.6%
23 1990 11 10 21 52.4% 4 5 9 44.4% 0 2 2 0.0% — — — — 1984 14 9 23 60.9% 0 1 1 0.0% 1 3 4 25.0% 3 4 7 42.9%
24 1991 10 8 18 55.6% 0 3 3 0.0% 0 1 1 0.0% 3 2 5 60.0% 1985 18 9 27 66.7% 0 2 2 0.0% 2 2 4 50.0% 9 5 14 64.3%
25 1992 3 11 14 21.4% 1 2 3 33.3% 2 2 4 50.0% 1 2 3 33.3% 1986 8 7 15 53.3% — — — — 1 2 3 33.3% 3 8 11 27.3%
26 1993 4 6 10 40.0% 1 4 5 20.0% 0 1 1 0.0% — — — — 1987 6 8 14 42.9% 0 2 2 0.0% 2 3 5 40.0% 1 3 4 25.0%
27 1994 2 3 5 40.0% 1 2 3 33.3% 0 2 2 0.0% 0 2 2 0.0% 1988 8 11 19 42.1% 1 1 2 50.0% 0 2 2 0.0% 3 3 6 50.0%
28 1995 2 2 4 50.0% 0 3 3 0.0% 3 3 6 50.0% 0 1 1 0.0% 1989 3 9 12 25.0% — — — — 2 3 5 40.0% 1 2 3 33.3%
29 1996 0 1 1 0.0% 0 1 1 0.0% 1 1 2 50.0% — — — — 1990 8 10 18 44.4% — — — — 0 2 2 0.0% 2 3 5 40.0%
30 — — — — — — — — — — — — — — — — — 1991 9 11 20 45.0% — — — — 1 2 3 33.3% 2 3 5 40.0%
31 — — — — — — — — — — — — — — — — — 1992 1 5 6 16.7% — — — — — — — — 0 2 2 0.0%
33 — — — — — — — — — — — — — — — — — 1994 0 1 1 0.0% — — — — — — — — — — — —
Career — 58 70 128 45.3% 30 43 73 41.1% 19 23 42 45.2% 12 21 33 36.4% — 104 118 222 46.8% 10 16 26 38.5% 16 27 43 37.2% 47 78 125 37.6%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. 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.

Age Isabelle Demongeot Mareen Louie Harper
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
13 — — — — — — — — — — — — — — — — 1974 1524 102.4 — — — — +72 — — 57.1% +0.29 1–0 1–0 — +0.56
15 — — — — — — — — — — — — — — — — 1976 1522 100.6 — — — — — — — 42.9% -0.57 0–1 — — +0.36
16 — — — — — — — — — — — — — — — — 1977 1520 116.3 — — — — — — — 0.0% -3.50 — 0–1 — -0.35
17 1984 1514 102.8 — — — — — — — 50.0% +0.50 — — — +0.09 1978 1589 122.4 — — — — +31 -31 — 34.1% -1.25 5–1 (83%) 2–1 (67%) 108.1 -0.33
18 1985 1520 106.0 — — — — — +7 +100 36.4% -0.95 — — — +0.76 1979 1568 121.3 — — — — +25 — — 30.0% -1.90 2–4 (33%) 2–1 (67%) — +0.42
19 1986 1609 129.8 — — — — -40 -65 +53 45.8% -0.20 2–5 (29%) 2–5 (29%) 96.1 +0.38 1980 1714 128.5 — — — — -41 -153 -36 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.6 +1.57
20 1987 1732 140.6 — — — — -56 -238 +22 45.2% -0.20 6–4 (60%) 0–1 — -0.92 1981 1743 134.3 — — — — -2 — -72 42.7% -0.51 7–5 (58%) 4–2 (67%) 105.0 -1.63
21 1988 1759 143.5 — — — — -71 -64 -55 53.9% +0.18 5–10 (33%) 4–1 (80%) 100.3 -3.79 1982 1655 124.8 — — — — -27 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.27
22 1989 1766 145.5 — — — — -4 -36 -73 53.3% +0.31 5–4 (56%) 4–3 (57%) 101.0 -3.59 1983 1671 132.0 — — — — -14 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.4 -0.99
23 1990 1688 134.0 — — — — +77 -6 — 43.5% -0.58 5–4 (56%) 3–1 (75%) 103.7 -1.98 1984 1733 127.5 — — — — +24 — -94 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.67
24 1991 1683 123.3 — — — — +67 -79 — 52.5% -0.12 2–5 (29%) 6–1 (86%) 98.5 +0.46 1985 1777 143.7 — — — — +52 — -157 58.5% +0.41 8–4 (67%) 5–5 (50%) 101.8 -0.01
25 1992 1626 122.8 — — — — -19 -17 +52 32.7% -0.90 1–3 (25%) 3–3 (50%) 96.6 -1.74 1986 1680 121.2 — — — — +20 — -65 39.1% -0.55 5–3 (63%) 2–5 (29%) 97.5 +1.39
26 1993 1593 116.2 — — — — +3 -6 — 33.3% -1.23 4–3 (57%) 1–0 — -0.63 1987 1624 119.5 — — — — +6 — -17 38.6% -0.67 3–4 (43%) 1–1 — +0.33
27 1994 1542 110.1 — — — — +37 +40 — 29.6% -1.11 1–2 (33%) 0–3 (0%) 95.9 +0.54 1988 1614 129.1 — — — — +11 — — 43.3% -0.43 4–5 (44%) 5–4 (56%) 100.4 -0.29
28 1995 1547 116.6 — — — — +52 -12 +36 38.7% -0.45 1–2 (33%) 0–1 — -0.04 1989 1576 117.3 — — — — -17 — -21 32.0% -1.38 6–4 (60%) 6–1 (86%) 107.4 -1.33
29 1996 1530 101.6 — — — — — — — 25.0% -1.88 — 1–0 — +0.15 1990 1590 128.4 — — — — +10 — — 45.8% -0.14 2–7 (22%) 1–3 (25%) 94.5 +0.31
30 — — — — — — — — — — — — — — — — 1991 1615 127.2 — — — — -4 — -50 39.4% -0.53 8–4 (67%) 4–4 (50%) 105.2 +0.46
31 — — — — — — — — — — — — — — — — 1992 1545 105.4 — — — — -7 — — 25.0% -1.81 0–2 1–0 — -0.11
33 — — — — — — — — — — — — — — — — 1994 1537 103.8 — — — — — — — 0.0% -2.50 — 0–1 — -0.17
Career — 1842 138.1 — — — — +1 -50 +21 44.7% -0.34 32–42 (43%) 24–19 (56%) 99.7 -3.75 — 1911 135.2 — — — — +7 -78 -59 42.4% -0.57 76–56 (58%) 40–42 (49%) 107.5 -0.10

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.