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

Kathleen Harter vs Naoko Sato H2H: 1-0

Kathleen Harter holds a 1–0 lead over Naoko Sato in their WTA head-to-head. Across 1 main-draw meeting, Kathleen Harter leads 1–0 on grass. Most recently, Kathleen Harter won the 1977 Sydney International round of 32 7-5 6-4.

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
1 – 0
1 main-draw meetings
Naoko Sato
JPN Age 71

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kathleen Harter 7-5 6-4 Naoko Sato Match data Dec 15, 1977* R32 Sydney International WTA 500 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
Naoko Sato — — — 1,628 56 91 38.1% 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 Kathleen Harter Naoko Sato
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1972 2–3 40.0% — 1,504 0 0
18 — — — — — — — 1973 4–6 40.0% — 1,495 0 0
19 — — — — — — — 1974 7–16 30.4% — 1,452 0 0
20 — — — — — — — 1975 5–7 41.7% — 1,492 0 0
21 1968 40–22 64.5% — 1,690 0 0 1976 4–8 33.3% — 1,530 0 0
22 1969 1–1 50.0% — 1,685 0 0 1977 8–12 40.0% — 1,566 0 0
23 1970 23–20 53.5% — 1,678 0 0 1978 6–7 46.2% — 1,594 0 0
24 1971 9–2 81.8% — 1,732 0 2 1979 8–9 47.1% — 1,594 0 0
25 — — — — — — — 1980 11–10 52.4% — 1,592 0 0
26 — — — — — — — 1981 1–6 14.3% — 1,531 0 0
27 1974 4–5 44.4% — 1,729 0 2 1982 0–1 0.0% — 1,520 0 0
28 1975 6–8 42.9% — 1,664 0 2 1983 0–4 0.0% — 1,467 0 0
29 1976 9–16 36.0% — 1,615 0 2 1984 0–1 0.0% — 1,458 0 0
30 1977 12–20 37.5% — 1,644 0 2 — — — — — — —
31 1978 2–9 18.2% — 1,591 0 2 — — — — — — —
32 — — — — — — — 1987 0–1 0.0% — 1,451 0 0

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 Naoko Sato
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 — — — — — — — — — — — — — — — — — 1972 0 1 1 0.0% 0 1 1 0.0% — — — — 2 1 3 66.7%
18 — — — — — — — — — — — — — — — — — 1973 — — — — 2 4 6 33.3% 2 2 4 50.0% — — — —
19 — — — — — — — — — — — — — — — — — 1974 2 2 4 50.0% 1 6 7 14.3% 2 4 6 33.3% 0 1 1 0.0%
20 — — — — — — — — — — — — — — — — — 1975 — — — — 3 2 5 60.0% 0 2 2 0.0% 0 1 1 0.0%
21 1968 12 5 17 70.6% 11 6 17 64.7% 16 9 25 64.0% 1 2 3 33.3% 1976 — — — — 0 4 4 0.0% 4 4 8 50.0% — — — —
22 1969 1 1 2 50.0% — — — — — — — — — — — — 1977 0 1 1 0.0% 1 2 3 33.3% 7 9 16 43.8% — — — —
23 1970 6 4 10 60.0% 7 7 14 50.0% 8 8 16 50.0% — — — — 1978 — — — — 1 2 3 33.3% 5 4 9 55.6% 0 1 1 0.0%
24 1971 1 1 2 50.0% — — — — 8 1 9 88.9% — — — — 1979 0 2 2 0.0% — — — — 4 5 9 44.4% — — — —
25 — — — — — — — — — — — — — — — — — 1980 1 1 2 50.0% 4 4 8 50.0% 3 4 7 42.9% — — — —
26 — — — — — — — — — — — — — — — — — 1981 0 3 3 0.0% 1 2 3 33.3% 0 1 1 0.0% — — — —
27 1974 2 2 4 50.0% 1 1 2 50.0% 0 1 1 0.0% 1 1 2 50.0% 1982 — — — — — — — — 0 1 1 0.0% — — — —
28 1975 — — — — 1 1 2 50.0% 3 2 5 60.0% 0 1 1 0.0% 1983 0 1 1 0.0% — — — — 0 2 2 0.0% — — — —
29 1976 0 1 1 0.0% 3 9 12 25.0% 5 5 10 50.0% 1 1 2 50.0% 1984 — — — — — — — — 0 1 1 0.0% — — — —
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% — — — — — — — — — — — — — — — — —
32 — — — — — — — — — — — — — — — — — 1987 — — — — — — — — 0 1 1 0.0% — — — —
Career — 25 20 45 55.6% 25 31 56 44.6% 46 35 81 56.8% 6 12 18 33.3% — 3 11 14 21.4% 13 27 40 32.5% 27 40 67 40.3% 2 4 6 33.3%

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 Naoko Sato
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 — — — — — — — — — — — — — — — — 1972 1505 88.1 — — — — +47 — — 36.4% -2.00 1–0 1–0 — +0.31
18 — — — — — — — — — — — — — — — — 1973 1496 92.8 — — — — — -8 +52 40.9% -1.41 1–1 — — +1.13
19 — — — — — — — — — — — — — — — — 1974 1453 91.0 — — — — +95 -59 +77 34.0% -1.11 3–4 (43%) 1–3 (25%) 97.2 +1.33
20 — — — — — — — — — — — — — — — — 1975 1493 95.6 — — — — — -27 — 40.7% -1.33 2–1 (67%) 1–1 — +0.98
21 1968 1691 124.1 — — — — +5 -60 +10 63.4% +1.09 6–5 (55%) — — 0.00 1976 1530 116.3 — — — — — -82 +48 28.0% -1.64 2–1 (67%) — — -0.39
22 1969 1686 102.9 — — — — — — — 40.0% -0.20 1–0 — — +0.23 1977 1567 121.7 — — — — — -112 +16 43.8% -0.69 3–5 (38%) 3–1 (75%) 101.1 +1.63
23 1970 1678 122.9 — — — — +41 -69 +30 53.1% +0.10 5–7 (42%) 2–0 — +0.91 1978 1595 111.7 — — — — — -138 +17 48.3% -0.17 1–2 (33%) 1–1 — +0.54
24 1971 1732 126.5 — — — — — — +71 79.2% +2.54 1–1 — — +2.89 1979 1594 114.4 — — — — — — +13 47.4% +0.05 2–2 (50%) 1–1 — +1.58
25 — — — — — — — — — — — — — — — — 1980 1593 108.7 — — — — — -117 -11 53.2% +0.30 2–3 (40%) 1–1 — +1.74
26 — — — — — — — — — — — — — — — — 1981 1531 97.3 — — — — -43 -32 — 23.5% -1.88 1–2 (33%) 1–1 — +0.51
27 1974 1729 112.1 — — — — -17 — — 42.1% -1.16 1–2 (33%) 1–0 — -0.51 1982 1520 99.4 — — — — — — — 0.0% -2.00 — — — +0.01
28 1975 1665 112.0 — — — — — — +97 44.1% -0.82 3–3 (50%) 1–1 — +0.39 1983 1467 93.8 — — — — — — — 11.1% -1.89 0–1 — — +0.48
29 1976 1615 122.9 — — — — +60 -57 +152 41.7% -0.45 3–7 (30%) 4–5 (44%) 95.7 +0.03 1984 1459 102.4 — — — — — — — 0.0% -1.50 — 0–1 — -0.02
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 — — — — — — — — — — — — — — — —
32 — — — — — — — — — — — — — — — — 1987 1451 91.3 — — — — — — — 0.0% -5.50 — — — -0.06
Career — 1746 127.1 — — — — +25 -67 +57 50.6% +0.08 26–30 (46%) 11–15 (42%) 95.9 +2.03 — 1629 106.1 — — — — +45 -69 +25 39.8% -0.84 18–22 (45%) 10–10 (50%) 101.4 +6.65

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.