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

Kathleen Harter vs Helga Masthoff H2H: 0-1

Helga Masthoff holds a 1–0 lead over Kathleen Harter in their WTA head-to-head. Across 1 main-draw meeting, Helga Masthoff leads 1–0 on grass. Most recently, Helga Masthoff won the 1976 ASB Classic semifinal 4-6 6-2 6-0.

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

Kathleen Harter
USA Age 79
H2H
0 – 1
1 main-draw meetings
Helga Masthoff
FRG Age 84 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Helga Masthoff 4-6 6-2 6-0 Kathleen Harter Match data Jan 10, 1976* SF ASB Classic 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
Kathleen Harter — — — 1,746 106 103 50.7% 0 0 0 0 2 2
Helga Masthoff — — — 2,113 391 115 77.3% 0 0 0 4 46 50

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 Kathleen Harter Helga Masthoff
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
21 1968 40–22 64.5% — 1,690 0 0 — — — — — — —
22 1969 1–1 50.0% — 1,685 0 0 — — — — — — —
23 1970 23–20 53.5% — 1,678 0 0 — — — — — — —
24 1971 9–2 81.8% — 1,732 0 2 — — — — — — —
26 — — — — — — — 1968 29–13 69.0% — 1,730 0 1
27 1974 4–5 44.4% — 1,729 0 2 1969 45–13 77.6% — 1,906 0 10
28 1975 6–8 42.9% — 1,664 0 2 1970 53–12 81.5% — 2,047 0 15
29 1976 9–16 36.0% — 1,615 0 2 1971 42–9 82.4% — 2,084 0 23
30 1977 12–20 37.5% — 1,644 0 2 1972 29–12 70.7% — 2,023 0 27
31 1978 2–9 18.2% — 1,591 0 2 1973 40–13 75.5% — 2,087 0 30
32 — — — — — — — 1974 27–10 73.0% — 2,019 0 33
33 — — — — — — — 1975 25–8 75.8% — 1,998 0 37
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 Kathleen Harter Helga Masthoff
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 %
21 1968 12 5 17 70.6% 11 6 17 64.7% 16 9 25 64.0% 1 2 3 33.3% — — — — — — — — — — — — — — — — —
22 1969 1 1 2 50.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
23 1970 6 4 10 60.0% 7 7 14 50.0% 8 8 16 50.0% — — — — — — — — — — — — — — — — — — — — —
24 1971 1 1 2 50.0% — — — — 8 1 9 88.9% — — — — — — — — — — — — — — — — — — — — —
26 — — — — — — — — — — — — — — — — — 1968 2 2 4 50.0% 22 7 29 75.9% 1 1 2 50.0% 4 3 7 57.1%
27 1974 2 2 4 50.0% 1 1 2 50.0% 0 1 1 0.0% 1 1 2 50.0% 1969 3 3 6 50.0% 39 7 46 84.8% — — — — 0 1 1 0.0%
28 1975 — — — — 1 1 2 50.0% 3 2 5 60.0% 0 1 1 0.0% 1970 — — — — 45 10 55 81.8% 3 1 4 75.0% 5 1 6 83.3%
29 1976 0 1 1 0.0% 3 9 12 25.0% 5 5 10 50.0% 1 1 2 50.0% 1971 5 2 7 71.4% 35 5 40 87.5% 2 2 4 50.0% — — — —
30 1977 2 4 6 33.3% 2 6 8 25.0% 5 7 12 41.7% 3 3 6 50.0% 1972 — — — — 28 8 36 77.8% 0 1 1 0.0% 1 3 4 25.0%
31 1978 1 2 3 33.3% 0 1 1 0.0% 1 2 3 33.3% 0 4 4 0.0% 1973 — — — — 34 10 44 77.3% 4 1 5 80.0% 2 2 4 50.0%
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% — — — —
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 — 25 20 45 55.6% 25 31 56 44.6% 46 35 81 56.8% 6 12 18 33.3% — 10 7 17 58.8% 320 78 398 80.4% 28 14 42 66.7% 19 12 31 61.3%

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 Kathleen Harter Helga Masthoff
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
21 1968 1691 124.1 — — — — +5 -60 +10 63.4% +1.09 6–5 (55%) — — 0.00 — — — — — — — — — — — — — — — —
22 1969 1686 102.9 — — — — — — — 40.0% -0.20 1–0 — — +0.23 — — — — — — — — — — — — — — — —
23 1970 1678 122.9 — — — — +41 -69 +30 53.1% +0.10 5–7 (42%) 2–0 — +0.91 — — — — — — — — — — — — — — — —
24 1971 1732 126.5 — — — — — — +71 79.2% +2.54 1–1 — — +2.89 — — — — — — — — — — — — — — — —
26 — — — — — — — — — — — — — — — — 1968 1730 128.1 — — — — -162 +89 — 66.7% +1.31 7–8 (47%) — — -1.04
27 1974 1729 112.1 — — — — -17 — — 42.1% -1.16 1–2 (33%) 1–0 — -0.51 1969 1907 137.1 — — — — -313 +115 — 74.0% +1.89 8–7 (53%) — — -0.20
28 1975 1665 112.0 — — — — — — +97 44.1% -0.82 3–3 (50%) 1–1 — +0.39 1970 2047 159.4 — — — — -330 +75 -427 79.6% +2.22 6–5 (55%) — — -5.92
29 1976 1615 122.9 — — — — +60 -57 +152 41.7% -0.45 3–7 (30%) 4–5 (44%) 95.7 +0.03 1971 2084 146.6 — — — — -311 +124 -455 72.0% +1.78 17–3 (85%) 2–2 (50%) 105.8 -1.82
30 1977 1644 127.2 — — — — +49 -96 +72 37.5% -0.88 5–3 (63%) 2–4 (33%) 101.5 +0.34 1972 2024 152.0 — — — — -290 +162 — 69.4% +1.51 4–1 (80%) 3–0 (100%) — -3.25
31 1978 1592 110.8 — — — — +42 — +109 24.0% -1.40 1–2 (33%) 1–5 (17%) 95.6 -0.07 1973 2088 160.2 — — — — -369 +126 -344 72.2% +1.77 8–3 (73%) 3–5 (38%) 101.3 -2.46
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
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 — 1746 127.1 — — — — +25 -67 +57 50.6% +0.08 26–30 (46%) 11–15 (42%) 95.9 +2.03 — 2114 153.3 — — — — -250 +115 -205 72.9% +1.76 85–42 (67%) 25–18 (58%) 104.1 -2.42

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.