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

Debbie Graham vs Mareen Louie Harper H2H: 2-0

Debbie Graham holds a 2–0 lead over Mareen Louie Harper in their WTA head-to-head. Across 2 main-draw meetings, Debbie Graham leads 2–0 on hard courts. Most recently, Debbie Graham won the 1992 Oklahoma round of 16 6-4 6-2.

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

Debbie Graham
USA Age 56 Right-Handed 183 cm / 6'0"
H2H
2 – 0
2 main-draw meetings
Mareen Louie Harper
USA Age 66

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Debbie Graham #39 6-4 6-2 Mareen Louie Harper Match data Feb 21, 1992* R16 Oklahoma Tier IV → modern equivalent WTA 250 Hard
Debbie Graham #54 6-4 6-4 Mareen Louie Harper Match data Sep 20, 1991* R16 Tokyo Nichirei Tier II → modern equivalent WTA 500 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
Debbie Graham #729 #35 190 1,757 83 90 48.0% 0 0 0 0 0 0
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 Debbie Graham 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 1987 1–1 50.0% — 1,502 0 0 1977 0–2 0.0% — 1,519 0 0
17 1988 3–2 60.0% #138 1,547 0 0 1978 7–12 36.8% — 1,588 0 0
18 1989 2–4 33.3% #256 1,512 0 0 1979 4–13 23.5% — 1,568 0 0
19 1990 5–4 55.6% #121 1,581 0 0 1980 22–23 48.9% — 1,714 0 0
20 1991 14–11 56.0% #42 1,685 0 0 1981 16–20 44.4% — 1,743 0 0
21 1992 21–19 52.5% #51 1,728 0 0 1982 9–18 33.3% — 1,654 0 0
22 1993 21–22 48.8% #65 1,683 0 0 1983 7–10 41.2% — 1,671 0 0
23 1994 8–10 44.4% #68 1,698 0 0 1984 18–17 51.4% — 1,733 0 1
24 1995 4–12 25.0% #131 1,598 0 0 1985 29–18 61.7% — 1,776 0 2
25 1996 4–5 44.4% #122 1,607 0 0 1986 12–17 41.4% — 1,679 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% — 1,536 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 Debbie Graham 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 1987 1 1 2 50.0% — — — — — — — — — — — — 1977 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0%
17 1988 3 2 5 60.0% — — — — — — — — — — — — 1978 4 5 9 44.4% 3 3 6 50.0% — — — — 0 4 4 0.0%
18 1989 2 2 4 50.0% — — — — 0 2 2 0.0% — — — — 1979 2 6 8 25.0% 0 1 1 0.0% 0 1 1 0.0% 2 5 7 28.6%
19 1990 2 2 4 50.0% 3 2 5 60.0% — — — — — — — — 1980 7 8 15 46.7% 3 2 5 60.0% 5 2 7 71.4% 7 11 18 38.9%
20 1991 12 8 20 60.0% 2 1 3 66.7% 0 1 1 0.0% 0 1 1 0.0% 1981 5 7 12 41.7% 1 1 2 50.0% 1 2 3 33.3% 9 10 19 47.4%
21 1992 13 10 23 56.5% 5 6 11 45.5% 1 1 2 50.0% 2 2 4 50.0% 1982 4 6 10 40.0% 2 1 3 66.7% 0 2 2 0.0% 3 9 12 25.0%
22 1993 12 10 22 54.5% 7 6 13 53.8% 0 2 2 0.0% 2 4 6 33.3% 1983 5 5 10 50.0% — — — — — — — — 2 5 7 28.6%
23 1994 5 8 13 38.5% — — — — 0 1 1 0.0% 3 1 4 75.0% 1984 14 9 23 60.9% 0 1 1 0.0% 1 3 4 25.0% 3 4 7 42.9%
24 1995 1 3 4 25.0% 2 6 8 25.0% 0 1 1 0.0% 1 2 3 33.3% 1985 18 9 27 66.7% 0 2 2 0.0% 2 2 4 50.0% 9 5 14 64.3%
25 1996 3 4 7 42.9% — — — — — — — — 1 1 2 50.0% 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 — 54 50 104 51.9% 19 21 40 47.5% 1 8 9 11.1% 9 11 20 45.0% — 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 Debbie Graham 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 1987 1502 96.8 — — — — — — — 50.0% -1.00 — — — +0.39 1977 1520 116.3 — — — — — — — 0.0% -3.50 — 0–1 — -0.35
17 1988 1548 116.6 — — — — +36 — — 58.3% +0.50 1–1 1–0 — +0.73 1978 1589 122.4 — — — — +31 -31 — 34.1% -1.25 5–1 (83%) 2–1 (67%) 108.1 -0.33
18 1989 1512 95.4 — — — — +58 — — 33.3% -0.83 — 0–1 — +1.17 1979 1568 121.3 — — — — +25 — — 30.0% -1.90 2–4 (33%) 2–1 (67%) — +0.42
19 1990 1582 122.4 — — — — +23 -2 — 52.4% -0.52 2–1 (67%) 1–0 — -0.27 1980 1714 128.5 — — — — -41 -153 -36 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.6 +1.57
20 1991 1686 138.0 — — — — +16 -85 — 56.6% +0.40 1–4 (20%) 3–0 (100%) 98.8 +1.00 1981 1743 134.3 — — — — -2 — -72 42.7% -0.51 7–5 (58%) 4–2 (67%) 105.0 -1.63
21 1992 1729 136.9 — — — — +3 -79 — 51.6% +0.15 7–6 (54%) 4–4 (50%) 100.3 -1.24 1982 1655 124.8 — — — — -27 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.27
22 1993 1684 134.3 — — — — +3 +30 — 49.5% -0.04 4–5 (44%) 3–3 (50%) 98.7 -0.72 1983 1671 132.0 — — — — -14 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.4 -0.99
23 1994 1699 133.9 — — — — +10 — — 48.8% -0.05 4–5 (44%) 2–1 (67%) 100.7 +0.20 1984 1733 127.5 — — — — +24 — -94 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.67
24 1995 1599 119.1 — — — — +85 +25 — 37.1% -0.69 0–5 (0%) 0–3 (0%) 90.6 -0.23 1985 1777 143.7 — — — — +52 — -157 58.5% +0.41 8–4 (67%) 5–5 (50%) 101.8 -0.01
25 1996 1608 118.4 — — — — +59 — — 42.9% +0.10 2–1 (67%) 0–2 — +0.30 1986 1680 121.2 — — — — +20 — -65 39.1% -0.55 5–3 (63%) 2–5 (29%) 97.5 +1.39
26 — — — — — — — — — — — — — — — — 1987 1624 119.5 — — — — +6 — -17 38.6% -0.67 3–4 (43%) 1–1 — +0.33
27 — — — — — — — — — — — — — — — — 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 — 1757 137.8 — — — — +19 -14 — 49.4% -0.03 21–28 (43%) 14–14 (50%) 96.0 +0.77 — 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.