H2H data updated: 2026-09-12 00:00 UTC

Helga Masthoff vs Mareen Louie Harper H2H: 1-0

Helga Masthoff holds a 1–0 lead over Mareen Louie Harper in their WTA head-to-head. Across 1 main-draw meeting, Helga Masthoff leads 1–0 on clay. Most recently, Helga Masthoff won the 1978 Roland Garros round of 32 3-6 6-4 6-2.

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Helga Masthoff
FRG Age 84 Right-Handed
H2H
1 – 0
1 main-draw meetings
Mareen Louie Harper
USA Age 66

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Helga Masthoff 3-6 6-4 6-2 Mareen Louie Harper Match data Jun 4, 1978* R32 Roland Garros Grand Slam Clay

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
Helga Masthoff — — — 2,113 391 115 77.3% 0 0 0 4 46 50
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 Helga Masthoff 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 — — — — — — — 1980 22–23 48.9% — 1,714 0 0
20 — — — — — — — 1981 16–20 44.4% — 1,743 0 0
21 — — — — — — — 1982 9–18 33.3% — 1,654 0 0
22 — — — — — — — 1983 7–10 41.2% — 1,671 0 0
23 — — — — — — — 1984 18–17 51.4% — 1,733 0 1
24 — — — — — — — 1985 29–18 61.7% — 1,776 0 2
25 — — — — — — — 1986 12–17 41.4% — 1,679 0 2
26 1968 29–13 69.0% — 1,730 0 1 1987 9–16 36.0% — 1,623 0 2
27 1969 45–13 77.6% — 1,906 0 10 1988 12–17 41.4% — 1,613 0 2
28 1970 53–12 81.5% — 2,047 0 15 1989 6–14 30.0% — 1,576 0 2
29 1971 42–9 82.4% — 2,084 0 23 1990 10–15 40.0% — 1,590 0 2
30 1972 29–12 70.7% — 2,023 0 27 1991 12–16 42.9% — 1,614 0 2
31 1973 40–13 75.5% — 2,087 0 30 1992 1–7 12.5% — 1,545 0 2
32 1974 27–10 73.0% — 2,019 0 33 — — — — — — —
33 1975 25–8 75.8% — 1,998 0 37 1994 0–1 0.0% — 1,536 0 2
34 1976 34–8 81.0% — 1,950 0 42 — — — — — — —
35 1977 18–4 81.8% — 1,941 0 45 — — — — — — —
36 1978 13–5 72.2% — 1,895 0 45 — — — — — — —
37 1979 10–1 90.9% — 1,930 0 48 — — — — — — —
38 1980 26–7 78.8% — 1,873 0 50 — — — — — — —

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 Helga Masthoff 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 — — — — — — — — — — — — — — — — — 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%
21 — — — — — — — — — — — — — — — — — 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 — — — — — — — — — — — — — — — — — 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 1968 2 2 4 50.0% 22 7 29 75.9% 1 1 2 50.0% 4 3 7 57.1% 1987 6 8 14 42.9% 0 2 2 0.0% 2 3 5 40.0% 1 3 4 25.0%
27 1969 3 3 6 50.0% 39 7 46 84.8% — — — — 0 1 1 0.0% 1988 8 11 19 42.1% 1 1 2 50.0% 0 2 2 0.0% 3 3 6 50.0%
28 1970 — — — — 45 10 55 81.8% 3 1 4 75.0% 5 1 6 83.3% 1989 3 9 12 25.0% — — — — 2 3 5 40.0% 1 2 3 33.3%
29 1971 5 2 7 71.4% 35 5 40 87.5% 2 2 4 50.0% — — — — 1990 8 10 18 44.4% — — — — 0 2 2 0.0% 2 3 5 40.0%
30 1972 — — — — 28 8 36 77.8% 0 1 1 0.0% 1 3 4 25.0% 1991 9 11 20 45.0% — — — — 1 2 3 33.3% 2 3 5 40.0%
31 1973 — — — — 34 10 44 77.3% 4 1 5 80.0% 2 2 4 50.0% 1992 1 5 6 16.7% — — — — — — — — 0 2 2 0.0%
32 1974 — — — — 24 8 32 75.0% 3 1 4 75.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
33 1975 — — — — 15 6 21 71.4% 9 2 11 81.8% — — — — 1994 0 1 1 0.0% — — — — — — — — — — — —
34 1976 — — — — 29 5 34 85.3% 5 3 8 62.5% — — — — — — — — — — — — — — — — — — — — —
35 1977 — — — — 13 2 15 86.7% 1 2 3 33.3% 4 0 4 100.0% — — — — — — — — — — — — — — — — —
36 1978 — — — — 8 3 11 72.7% — — — — 3 1 4 75.0% — — — — — — — — — — — — — — — — —
37 1979 — — — — 5 1 6 83.3% — — — — — — — — — — — — — — — — — — — — — — — — —
38 1980 — — — — 23 6 29 79.3% — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 10 7 17 58.8% 320 78 398 80.4% 28 14 42 66.7% 19 12 31 61.3% — 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 Helga Masthoff 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 — — — — — — — — — — — — — — — — 1980 1714 128.5 — — — — -41 -153 -36 46.2% -0.59 12–4 (75%) 2–6 (25%) 107.6 +1.57
20 — — — — — — — — — — — — — — — — 1981 1743 134.3 — — — — -2 — -72 42.7% -0.51 7–5 (58%) 4–2 (67%) 105.0 -1.63
21 — — — — — — — — — — — — — — — — 1982 1655 124.8 — — — — -27 -46 — 35.5% -1.06 4–4 (50%) 1–2 (33%) 99.6 -1.27
22 — — — — — — — — — — — — — — — — 1983 1671 132.0 — — — — -14 — — 42.9% -0.43 2–1 (67%) 1–2 (33%) 100.4 -0.99
23 — — — — — — — — — — — — — — — — 1984 1733 127.5 — — — — +24 — -94 48.8% -0.05 7–3 (70%) 2–3 (40%) 105.0 +0.67
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 1968 1730 128.1 — — — — -162 +89 — 66.7% +1.31 7–8 (47%) — — -1.04 1987 1624 119.5 — — — — +6 — -17 38.6% -0.67 3–4 (43%) 1–1 — +0.33
27 1969 1907 137.1 — — — — -313 +115 — 74.0% +1.89 8–7 (53%) — — -0.20 1988 1614 129.1 — — — — +11 — — 43.3% -0.43 4–5 (44%) 5–4 (56%) 100.4 -0.29
28 1970 2047 159.4 — — — — -330 +75 -427 79.6% +2.22 6–5 (55%) — — -5.92 1989 1576 117.3 — — — — -17 — -21 32.0% -1.38 6–4 (60%) 6–1 (86%) 107.4 -1.33
29 1971 2084 146.6 — — — — -311 +124 -455 72.0% +1.78 17–3 (85%) 2–2 (50%) 105.8 -1.82 1990 1590 128.4 — — — — +10 — — 45.8% -0.14 2–7 (22%) 1–3 (25%) 94.5 +0.31
30 1972 2024 152.0 — — — — -290 +162 — 69.4% +1.51 4–1 (80%) 3–0 (100%) — -3.25 1991 1615 127.2 — — — — -4 — -50 39.4% -0.53 8–4 (67%) 4–4 (50%) 105.2 +0.46
31 1973 2088 160.2 — — — — -369 +126 -344 72.2% +1.77 8–3 (73%) 3–5 (38%) 101.3 -2.46 1992 1545 105.4 — — — — -7 — — 25.0% -1.81 0–2 1–0 — -0.11
32 1974 2019 153.9 — — — — — +99 -212 67.5% +1.24 8–2 (80%) 2–2 (50%) 102.8 -3.17 — — — — — — — — — — — — — — — —
33 1975 1999 142.8 — — — — — +76 -105 71.6% +1.26 7–3 (70%) 6–3 (67%) 104.5 -0.41 1994 1537 103.8 — — — — — — — 0.0% -2.50 — 0–1 — -0.17
34 1976 1951 146.9 — — — — — +125 -61 76.1% +2.14 6–2 (75%) 1–2 (33%) 99.7 +1.10 — — — — — — — — — — — — — — — —
35 1977 1941 128.5 — — — — -150 +143 -91 75.5% +1.73 4–1 (80%) 3–1 (75%) 103.1 +2.07 — — — — — — — — — — — — — — — —
36 1978 1895 134.2 — — — — -97 +128 — 68.4% +1.55 2–2 (50%) 1–0 — +1.22 — — — — — — — — — — — — — — — —
37 1979 1930 131.0 — — — — — +128 — 85.7% +2.86 1–0 1–1 — +0.26 — — — — — — — — — — — — — — — —
38 1980 1873 133.5 — — — — — +139 — 73.1% +1.86 7–5 (58%) 3–2 (60%) 97.5 +1.56 — — — — — — — — — — — — — — — —
Career — 2114 153.3 — — — — -250 +115 -205 72.9% +1.76 85–42 (67%) 25–18 (58%) 104.1 -2.42 — 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.