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

Kathleen Harter vs Kazuko Sawamatsu H2H: 0-1

Kazuko Sawamatsu holds a 1–0 lead over Kathleen Harter in their WTA head-to-head. They have met 1 times in main draws. Most recently, Kazuko Sawamatsu won the 1970 Japan Women's Open final 6-3 7-5.

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Kathleen Harter
USA Age 79
H2H
0 – 1
1 main-draw meetings
Kazuko Sawamatsu
JPN Age 75 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kazuko Sawamatsu 6-3 7-5 Kathleen Harter Match data Nov 8, 1970* F Japan Women's Open WTA 250 —

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
Kazuko Sawamatsu — — — 1,954 179 100 64.2% 0 0 0 1 8 9

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 Kazuko Sawamatsu
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1968 9–7 56.2% — 1,556 0 0
18 — — — — — — — 1969 16–8 66.7% — 1,674 0 1
19 — — — — — — — 1970 10–8 55.6% — 1,727 0 2
20 — — — — — — — 1971 18–10 64.3% — 1,826 0 3
21 1968 40–22 64.5% — 1,690 0 0 1972 28–16 63.6% — 1,848 0 6
22 1969 1–1 50.0% — 1,685 0 0 1973 38–21 64.4% — 1,825 0 6
23 1970 23–20 53.5% — 1,678 0 0 1974 37–20 64.9% — 1,900 0 8
24 1971 9–2 81.8% — 1,732 0 2 1975 23–10 69.7% — 1,954 0 9
27 1974 4–5 44.4% — 1,729 0 2 — — — — — — —
28 1975 6–8 42.9% — 1,664 0 2 — — — — — — —
29 1976 9–16 36.0% — 1,615 0 2 — — — — — — —
30 1977 12–20 37.5% — 1,644 0 2 — — — — — — —
31 1978 2–9 18.2% — 1,591 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 Kathleen Harter Kazuko Sawamatsu
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 %
17 — — — — — — — — — — — — — — — — — 1968 — — — — 9 5 14 64.3% 0 2 2 0.0% — — — —
18 — — — — — — — — — — — — — — — — — 1969 — — — — 13 6 19 68.4% 3 2 5 60.0% — — — —
19 — — — — — — — — — — — — — — — — — 1970 — — — — 3 4 7 42.9% 4 4 8 50.0% — — — —
20 — — — — — — — — — — — — — — — — — 1971 — — — — 4 4 8 50.0% 14 6 20 70.0% — — — —
21 1968 12 5 17 70.6% 11 6 17 64.7% 16 9 25 64.0% 1 2 3 33.3% 1972 1 1 2 50.0% 11 7 18 61.1% 13 8 21 61.9% 3 0 3 100.0%
22 1969 1 1 2 50.0% — — — — — — — — — — — — 1973 3 1 4 75.0% 18 8 26 69.2% 16 9 25 64.0% 1 3 4 25.0%
23 1970 6 4 10 60.0% 7 7 14 50.0% 8 8 16 50.0% — — — — 1974 6 1 7 85.7% 11 9 20 55.0% 17 9 26 65.4% 3 1 4 75.0%
24 1971 1 1 2 50.0% — — — — 8 1 9 88.9% — — — — 1975 — — — — 19 7 26 73.1% 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% — — — — — — — — — — — — — — — — —
28 1975 — — — — 1 1 2 50.0% 3 2 5 60.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
29 1976 0 1 1 0.0% 3 9 12 25.0% 5 5 10 50.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
30 1977 2 4 6 33.3% 2 6 8 25.0% 5 7 12 41.7% 3 3 6 50.0% — — — — — — — — — — — — — — — — —
31 1978 1 2 3 33.3% 0 1 1 0.0% 1 2 3 33.3% 0 4 4 0.0% — — — — — — — — — — — — — — — — —
Career — 25 20 45 55.6% 25 31 56 44.6% 46 35 81 56.8% 6 12 18 33.3% — 10 3 13 76.9% 88 50 138 63.8% 71 43 114 62.3% 7 4 11 63.6%

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 Kathleen Harter Kazuko Sawamatsu
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
17 — — — — — — — — — — — — — — — — 1968 1556 119.1 — — — — — +59 — 56.3% +0.87 2–0 — — +0.07
18 — — — — — — — — — — — — — — — — 1969 1674 127.4 — — — — — +49 -122 64.7% +1.25 2–1 (67%) — — +0.72
19 — — — — — — — — — — — — — — — — 1970 1727 133.7 — — — — — -29 -107 59.1% +0.75 2–6 (25%) — — -1.68
20 — — — — — — — — — — — — — — — — 1971 1827 139.8 — — — — — -118 0 59.3% +0.81 6–1 (86%) 1–0 — -2.27
21 1968 1691 124.1 — — — — +5 -60 +10 63.4% +1.09 6–5 (55%) — — 0.00 1972 1848 149.8 — — — — -200 -59 +3 61.1% +1.22 5–4 (56%) — — -3.87
22 1969 1686 102.9 — — — — — — — 40.0% -0.20 1–0 — — +0.23 1973 1826 145.5 — — — — -160 +61 +45 60.9% +0.99 10–5 (67%) 3–4 (43%) 104.0 +1.60
23 1970 1678 122.9 — — — — +41 -69 +30 53.1% +0.10 5–7 (42%) 2–0 — +0.91 1974 1900 150.9 — — — — -79 -49 +35 61.7% +0.94 8–2 (80%) 4–3 (57%) 106.4 -3.51
24 1971 1732 126.5 — — — — — — +71 79.2% +2.54 1–1 — — +2.89 1975 1955 150.1 — — — — — +26 -50 64.9% +1.09 6–2 (75%) 3–1 (75%) 106.5 -0.94
27 1974 1729 112.1 — — — — -17 — — 42.1% -1.16 1–2 (33%) 1–0 — -0.51 — — — — — — — — — — — — — — — —
28 1975 1665 112.0 — — — — — — +97 44.1% -0.82 3–3 (50%) 1–1 — +0.39 — — — — — — — — — — — — — — — —
29 1976 1615 122.9 — — — — +60 -57 +152 41.7% -0.45 3–7 (30%) 4–5 (44%) 95.7 +0.03 — — — — — — — — — — — — — — — —
30 1977 1644 127.2 — — — — +49 -96 +72 37.5% -0.88 5–3 (63%) 2–4 (33%) 101.5 +0.34 — — — — — — — — — — — — — — — —
31 1978 1592 110.8 — — — — +42 — +109 24.0% -1.40 1–2 (33%) 1–5 (17%) 95.6 -0.07 — — — — — — — — — — — — — — — —
Career — 1746 127.1 — — — — +25 -67 +57 50.6% +0.08 26–30 (46%) 11–15 (42%) 95.9 +2.03 — 1955 150.4 — — — — -131 +6 +3 61.3% +1.01 41–21 (66%) 11–8 (58%) 110.7 -3.61

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.