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

Mareen Louie Harper vs Debbie Spence Nasim H2H: 2-0

Mareen Louie Harper holds a 2–0 lead over Debbie Spence Nasim in their WTA head-to-head. Across 2 main-draw meetings, Mareen Louie Harper leads 2–0 on hard courts. Most recently, Mareen Louie Harper won the 1987 US Open round of 128 6-4 6-1.

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Mareen Louie Harper
USA Age 66
H2H
2 – 0
2 main-draw meetings
Debbie Spence Nasim
USA Age 59

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mareen Louie Harper 6-4 6-1 Debbie Spence Nasim Match data Sep 3, 1987* R128 US Open Grand Slam Hard
Mareen Louie Harper 6-3 6-0 Debbie Spence Nasim Match data Sep 26, 1986* R16 Tulsa 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
Mareen Louie Harper — — — 1,911 179 240 42.7% 0 0 0 0 2 2
Debbie Spence Nasim — — — 1,827 56 62 47.5% 0 0 0 1 0 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.

Age Mareen Louie Harper Debbie Spence Nasim
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 1983 4–2 66.7% — 1,565 0 0
16 1977 0–2 0.0% — 1,519 0 0 1984 9–7 56.2% — 1,649 0 1
17 1978 9–13 40.9% — 1,599 0 0 1985 25–19 56.8% — 1,777 0 1
18 1979 4–13 23.5% — 1,575 0 0 1986 13–22 37.1% — 1,619 0 1
19 1980 22–23 48.9% — 1,719 0 0 1987 4–11 26.7% — 1,555 0 1
20 1981 16–20 44.4% — 1,745 0 0 — — — — — — —
21 1982 9–18 33.3% — 1,656 0 0 1989 1–1 50.0% — 1,558 0 1
22 1983 7–10 41.2% — 1,672 0 0 — — — — — — —
23 1984 18–17 51.4% — 1,734 0 1 — — — — — — —
24 1985 29–18 61.7% — 1,777 0 2 — — — — — — —
25 1986 12–17 41.4% — 1,680 0 2 — — — — — — —
26 1987 9–16 36.0% — 1,623 0 2 — — — — — — —
27 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% — 1,537 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 Mareen Louie Harper Debbie Spence Nasim
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% — — — — 1983 4 2 6 66.7% — — — — — — — — — — — —
16 1977 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0% 1984 7 3 10 70.0% 2 2 4 50.0% — — — — 0 2 2 0.0%
17 1978 6 6 12 50.0% 3 3 6 50.0% — — — — 0 4 4 0.0% 1985 8 8 16 50.0% 14 8 22 63.6% — — — — 3 3 6 50.0%
18 1979 2 6 8 25.0% 0 1 1 0.0% 0 1 1 0.0% 2 5 7 28.6% 1986 5 8 13 38.5% 7 6 13 53.8% 0 3 3 0.0% 1 5 6 16.7%
19 1980 7 8 15 46.7% 3 2 5 60.0% 5 2 7 71.4% 7 11 18 38.9% 1987 1 5 6 16.7% 2 4 6 33.3% 0 1 1 0.0% 1 1 2 50.0%
20 1981 5 7 12 41.7% 1 1 2 50.0% 1 2 3 33.3% 9 10 19 47.4% — — — — — — — — — — — — — — — — —
21 1982 4 6 10 40.0% 2 1 3 66.7% 0 2 2 0.0% 3 9 12 25.0% 1989 1 1 2 50.0% — — — — — — — — — — — —
22 1983 5 5 10 50.0% — — — — — — — — 2 5 7 28.6% — — — — — — — — — — — — — — — — —
23 1984 14 9 23 60.9% 0 1 1 0.0% 1 3 4 25.0% 3 4 7 42.9% — — — — — — — — — — — — — — — — —
24 1985 18 9 27 66.7% 0 2 2 0.0% 2 2 4 50.0% 9 5 14 64.3% — — — — — — — — — — — — — — — — —
25 1986 8 7 15 53.3% — — — — 1 2 3 33.3% 3 8 11 27.3% — — — — — — — — — — — — — — — — —
26 1987 6 8 14 42.9% 0 2 2 0.0% 2 3 5 40.0% 1 3 4 25.0% — — — — — — — — — — — — — — — — —
27 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 — 106 119 225 47.1% 10 16 26 38.5% 16 27 43 37.2% 47 78 125 37.6% — 26 27 53 49.1% 25 20 45 55.6% 0 4 4 0.0% 5 11 16 31.2%

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 Mareen Louie Harper Debbie Spence Nasim
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 — — +0.37 1983 1565 107.6 — — — — +77 — — 61.5% +0.38 1–0 2–0 — +0.33
16 1977 1520 116.0 — — — — — — — 0.0% -3.50 — 0–1 — -0.35 1984 1650 120.6 — — — — +26 -53 — 55.0% +0.22 4–4 (50%) 2–2 (50%) 99.8 +0.64
17 1978 1599 122.7 — — — — +32 -41 — 39.2% -0.96 5–2 (71%) 3–1 (75%) 107.4 +0.50 1985 1778 141.5 — — — — -52 -20 — 54.7% +0.34 7–4 (64%) 3–6 (33%) 103.0 -1.62
18 1979 1576 121.8 — — — — +27 — — 30.0% -1.90 2–4 (33%) 2–1 (67%) — +0.40 1986 1619 117.0 — — — — -1 +131 -89 35.5% -1.12 5–1 (83%) 3–3 (50%) 105.9 +0.15
19 1980 1719 129.4 — — — — -38 -158 -41 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.4 +1.11 1987 1555 115.3 — — — — +9 +132 — 29.0% -1.77 2–1 (67%) 2–1 (67%) — -0.25
20 1981 1746 134.8 — — — — -2 — -75 42.7% -0.51 7–5 (58%) 4–2 (67%) 104.9 -1.67 — — — — — — — — — — — — — — — —
21 1982 1656 125.3 — — — — -25 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.44 1989 1558 101.4 — — — — — — — 66.7% +2.33 1–0 0–1 — +0.19
22 1983 1672 132.3 — — — — -12 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.3 -0.96 — — — — — — — — — — — — — — — —
23 1984 1734 127.7 — — — — +24 — -95 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.48 — — — — — — — — — — — — — — — —
24 1985 1778 143.9 — — — — +52 — -156 58.5% +0.41 8–4 (67%) 5–5 (50%) 101.8 -0.23 — — — — — — — — — — — — — — — —
25 1986 1680 121.3 — — — — +20 — -64 39.1% -0.55 5–3 (63%) 2–5 (29%) 97.5 +1.36 — — — — — — — — — — — — — — — —
26 1987 1624 119.6 — — — — +7 — -16 38.6% -0.67 3–4 (43%) 1–1 — +0.21 — — — — — — — — — — — — — — — —
27 1988 1614 129.2 — — — — +12 — — 43.3% -0.43 4–5 (44%) 5–4 (56%) 100.4 -0.37 — — — — — — — — — — — — — — — —
28 1989 1577 117.4 — — — — -17 — -22 32.0% -1.38 6–4 (60%) 6–1 (86%) 107.4 -1.28 — — — — — — — — — — — — — — — —
29 1990 1591 128.5 — — — — +9 — — 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 105.5 — — — — -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 — 1911 135.4 — — — — +8 -84 -60 42.6% -0.56 76–57 (57%) 41–42 (49%) 107.5 -0.20 — 1828 129.8 — — — — -5 +41 -89 46.5% -0.34 20–10 (67%) 12–13 (48%) 107.8 -0.48

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.