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

Mareen Louie Harper vs Roberta Mccallum H2H: 2-0

Mareen Louie Harper holds a 2–0 lead over Roberta Mccallum in their WTA head-to-head. Across 2 main-draw meetings, Mareen Louie Harper leads 1–0 on carpet and 1–0 on grass. Most recently, Mareen Louie Harper won the 1980 Eastbourne Open round of 64 7-5 2-6 6-1.

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

Mareen Louie Harper
USA Age 66
H2H
2 – 0
2 main-draw meetings
Roberta Mccallum
USA Age 67

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mareen Louie Harper 7-5 2-6 6-1 Roberta Mccallum Match data Jun 18, 1980* R64 Eastbourne Open WTA 250 Grass
Mareen Louie Harper 6-2 6-4 Roberta Mccallum Match data Apr 3, 1980* QF Edmond WTA 250 Carpet

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 — — — 1,910 177 239 42.5% 0 0 0 0 2 2
Roberta Mccallum — — — 1,660 24 43 35.8% 0 0 0 0 0 0

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 Roberta Mccallum
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 1980 22–23 48.9% — 1,714 0 0 1978 0–1 0.0% — 1,484 0 0
20 1981 16–20 44.4% — 1,743 0 0 1979 6–5 54.5% — 1,573 0 0
21 1982 9–18 33.3% — 1,654 0 0 1980 14–27 34.1% — 1,582 0 0
22 1983 7–10 41.2% — 1,671 0 0 1981 4–9 30.8% — 1,568 0 0
23 1984 18–17 51.4% — 1,733 0 1 1982 0–1 0.0% — 1,549 0 0
24 1985 29–18 61.7% — 1,776 0 2 — — — — — — —
25 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 Mareen Louie Harper Roberta Mccallum
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 1980 7 8 15 46.7% 3 2 5 60.0% 5 2 7 71.4% 7 11 18 38.9% — — — — — — — — — — — — — — — — —
20 1981 5 7 12 41.7% 1 1 2 50.0% 1 2 3 33.3% 9 10 19 47.4% 1979 — — — — — — — — 3 4 7 42.9% — — — —
21 1982 4 6 10 40.0% 2 1 3 66.7% 0 2 2 0.0% 3 9 12 25.0% 1980 3 4 7 42.9% 0 3 3 0.0% 1 4 5 20.0% 10 16 26 38.5%
22 1983 5 5 10 50.0% — — — — — — — — 2 5 7 28.6% 1981 2 4 6 33.3% 0 1 1 0.0% 0 1 1 0.0% 2 3 5 40.0%
23 1984 14 9 23 60.9% 0 1 1 0.0% 1 3 4 25.0% 3 4 7 42.9% 1982 0 1 1 0.0% — — — — — — — — — — — —
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 — 104 118 222 46.8% 10 16 26 38.5% 16 27 43 37.2% 47 78 125 37.6% — 5 9 14 35.7% 0 4 4 0.0% 4 9 13 30.8% 12 19 31 38.7%

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 Roberta Mccallum
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 1980 1714 128.5 — — — — -41 -153 -36 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.6 +1.57 1978 1484 96.8 — — — — — — — 0.0% -3.50 — 0–1 — +0.04
20 1981 1743 134.3 — — — — -2 — -72 42.7% -0.51 7–5 (58%) 4–2 (67%) 105.0 -1.63 1979 1573 116.3 — — — — — — +15 50.0% -0.46 1–3 (25%) 1–0 — -0.41
21 1982 1655 124.8 — — — — -27 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.27 1980 1582 127.2 — — — — +6 -80 -45 35.9% -1.14 5–5 (50%) 1–2 (33%) 99.9 +1.55
22 1983 1671 132.0 — — — — -14 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.4 -0.99 1981 1568 107.3 — — — — +56 — — 33.3% -1.81 0–1 2–1 (67%) — +0.48
23 1984 1733 127.5 — — — — +24 — -94 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.67 1982 1549 95.7 — — — — — — — 0.0% -4.00 — — — +0.17
24 1985 1777 143.7 — — — — +52 — -157 58.5% +0.41 8–4 (67%) 5–5 (50%) 101.8 -0.01 — — — — — — — — — — — — — — — —
25 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 — 1911 135.2 — — — — +7 -78 -59 42.4% -0.57 76–56 (58%) 40–42 (49%) 107.5 -0.10 — 1661 121.1 — — — — +19 -80 -10 36.6% -1.23 6–9 (40%) 4–4 (50%) 98.5 +2.73

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.