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

Diane Desfor vs Mareen Louie Harper H2H: 0-1

Mareen Louie Harper holds a 1–0 lead over Diane Desfor in their WTA head-to-head. Across 1 main-draw meeting, Mareen Louie Harper leads 1–0 on grass. Most recently, Mareen Louie Harper won the 1980 Eastbourne Open quarterfinal 6-4 4-6 6-4.

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Diane Desfor
USA Age 71 Right-Handed 165 cm / 5'5"
H2H
0 – 1
1 main-draw meetings
Mareen Louie Harper
USA Age 66

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mareen Louie Harper 6-4 4-6 6-4 Diane Desfor Match data Jun 21, 1980* QF Eastbourne Open WTA 250 Grass

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
Diane Desfor — — — 1,775 69 89 43.7% 0 0 0 0 2 2
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 Diane Desfor 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 — — — — — — — 1978 7–12 36.8% — 1,588 0 0
18 — — — — — — — 1979 4–13 23.5% — 1,568 0 0
19 1974 1–2 33.3% — 1,482 0 0 1980 22–23 48.9% — 1,714 0 0
20 1975 5–3 62.5% — 1,524 0 0 1981 16–20 44.4% — 1,743 0 0
21 1976 4–1 80.0% — 1,580 0 1 1982 9–18 33.3% — 1,654 0 0
22 1977 1–1 50.0% — 1,567 0 1 1983 7–10 41.2% — 1,671 0 0
23 1978 14–17 45.2% — 1,641 0 1 1984 18–17 51.4% — 1,733 0 1
24 1979 15–22 40.5% — 1,688 0 1 1985 29–18 61.7% — 1,776 0 2
25 1980 18–21 46.2% — 1,648 0 1 1986 12–17 41.4% — 1,679 0 2
26 1981 8–17 32.0% — 1,613 0 1 1987 9–16 36.0% — 1,623 0 2
27 1982 3–5 37.5% — 1,586 0 2 1988 12–17 41.4% — 1,613 0 2
28 — — — — — — — 1989 6–14 30.0% — 1,576 0 2
29 — — — — — — — 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 Diane Desfor 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 — — — — — — — — — — — — — — — — — 1978 4 5 9 44.4% 3 3 6 50.0% — — — — 0 4 4 0.0%
18 — — — — — — — — — — — — — — — — — 1979 2 6 8 25.0% 0 1 1 0.0% 0 1 1 0.0% 2 5 7 28.6%
19 1974 — — — — 1 1 2 50.0% 0 1 1 0.0% — — — — 1980 7 8 15 46.7% 3 2 5 60.0% 5 2 7 71.4% 7 11 18 38.9%
20 1975 — — — — — — — — 2 1 3 66.7% — — — — 1981 5 7 12 41.7% 1 1 2 50.0% 1 2 3 33.3% 9 10 19 47.4%
21 1976 — — — — 0 1 1 0.0% — — — — — — — — 1982 4 6 10 40.0% 2 1 3 66.7% 0 2 2 0.0% 3 9 12 25.0%
22 — — — — — — — — — — — — — — — — — 1983 5 5 10 50.0% — — — — — — — — 2 5 7 28.6%
23 1978 7 6 13 53.8% 2 5 7 28.6% 2 4 6 33.3% 3 2 5 60.0% 1984 14 9 23 60.9% 0 1 1 0.0% 1 3 4 25.0% 3 4 7 42.9%
24 1979 5 6 11 45.5% 1 3 4 25.0% 6 7 13 46.2% 3 6 9 33.3% 1985 18 9 27 66.7% 0 2 2 0.0% 2 2 4 50.0% 9 5 14 64.3%
25 1980 4 9 13 30.8% 1 2 3 33.3% 12 7 19 63.2% 1 3 4 25.0% 1986 8 7 15 53.3% — — — — 1 2 3 33.3% 3 8 11 27.3%
26 1981 1 4 5 20.0% 0 3 3 0.0% 7 7 14 50.0% 0 3 3 0.0% 1987 6 8 14 42.9% 0 2 2 0.0% 2 3 5 40.0% 1 3 4 25.0%
27 1982 2 2 4 50.0% 0 1 1 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 — — — — — — — — — — — — — — — — — 1989 3 9 12 25.0% — — — — 2 3 5 40.0% 1 2 3 33.3%
29 — — — — — — — — — — — — — — — — — 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 — 19 27 46 41.3% 5 16 21 23.8% 29 29 58 50.0% 7 14 21 33.3% — 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 Diane Desfor 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 — — — — — — — — — — — — — — — — 1978 1589 122.4 — — — — +31 -31 — 34.1% -1.25 5–1 (83%) 2–1 (67%) 108.1 -0.33
18 — — — — — — — — — — — — — — — — 1979 1568 121.3 — — — — +25 — — 30.0% -1.90 2–4 (33%) 2–1 (67%) — +0.42
19 1974 1483 94.1 — — — — — — — 28.6% -1.57 1–0 0–1 — +0.64 1980 1714 128.5 — — — — -41 -153 -36 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.6 +1.57
20 1975 1525 105.5 — — — — — — +34 55.0% +0.05 3–1 (75%) 2–0 — +0.97 1981 1743 134.3 — — — — -2 — -72 42.7% -0.51 7–5 (58%) 4–2 (67%) 105.0 -1.63
21 1976 1580 118.1 — — — — — — — 72.7% +1.91 1–0 1–0 — -0.10 1982 1655 124.8 — — — — -27 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.27
22 1977 1568 99.4 — — — — — — — 60.0% +1.00 0–1 — — +0.33 1983 1671 132.0 — — — — -14 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.4 -0.99
23 1978 1641 122.6 — — — — +30 -131 -97 44.6% -0.07 7–7 (50%) 3–6 (33%) 98.7 +0.61 1984 1733 127.5 — — — — +24 — -94 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.67
24 1979 1689 129.6 — — — — -37 -166 -73 40.2% -0.57 5–5 (50%) 2–6 (25%) 98.8 +0.12 1985 1777 143.7 — — — — +52 — -157 58.5% +0.41 8–4 (67%) 5–5 (50%) 101.8 -0.01
25 1980 1649 126.4 — — — — -120 -124 +77 46.7% -0.22 6–8 (43%) 5–3 (63%) 101.5 -1.43 1986 1680 121.2 — — — — +20 — -65 39.1% -0.55 5–3 (63%) 2–5 (29%) 97.5 +1.39
26 1981 1614 112.5 — — — — -87 -99 +82 33.3% -1.11 2–4 (33%) — — -1.06 1987 1624 119.5 — — — — +6 — -17 38.6% -0.67 3–4 (43%) 1–1 — +0.33
27 1982 1586 105.7 — — — — -77 — — 42.1% +0.32 1–2 (33%) 0–2 — +0.83 1988 1614 129.1 — — — — +11 — — 43.3% -0.43 4–5 (44%) 5–4 (56%) 100.4 -0.29
28 — — — — — — — — — — — — — — — — 1989 1576 117.3 — — — — -17 — -21 32.0% -1.38 6–4 (60%) 6–1 (86%) 107.4 -1.33
29 — — — — — — — — — — — — — — — — 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 — 1775 125.0 — — — — -48 -132 +21 43.6% -0.30 26–28 (48%) 13–18 (42%) 98.7 +0.59 — 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.