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

Kazuko Sawamatsu vs Jill Cooper H2H: 1-0

Kazuko Sawamatsu holds a 1–0 lead over Jill Cooper in their WTA head-to-head. Across 1 main-draw meeting, Kazuko Sawamatsu leads 1–0 on grass. Most recently, Kazuko Sawamatsu won the 1972 US Open round of 128 5-7 6-4 6-4.

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Kazuko Sawamatsu
JPN Age 75 Right-Handed
H2H
1 – 0
1 main-draw meetings
Jill Cooper
GBR Age 77

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kazuko Sawamatsu 5-7 6-4 6-4 Jill Cooper Match data Sep 1, 1972* R128 US Open Grand Slam 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
Kazuko Sawamatsu — — — 1,954 179 100 64.2% 0 0 0 1 8 9
Jill Cooper — — — 1,842 106 86 55.2% 0 0 0 0 5 5

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 Kazuko Sawamatsu Jill Cooper
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 1968 8–11 42.1% — 1,502 0 0
20 1971 18–10 64.3% — 1,826 0 3 1969 15–16 48.4% — 1,563 0 0
21 1972 28–16 63.6% — 1,848 0 6 1970 18–16 52.9% — 1,636 0 1
22 1973 38–21 64.4% — 1,825 0 6 1971 36–19 65.5% — 1,755 0 3
23 1974 37–20 64.9% — 1,900 0 8 1972 21–18 53.8% — 1,782 0 4
24 1975 23–10 69.7% — 1,954 0 9 1973 8–6 57.1% — 1,810 0 5

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 Kazuko Sawamatsu Jill Cooper
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% — — — — 1968 — — — — 3 5 8 37.5% 2 4 6 33.3% 3 2 5 60.0%
20 1971 — — — — 4 4 8 50.0% 14 6 20 70.0% — — — — 1969 — — — — 8 7 15 53.3% 6 7 13 46.2% 1 2 3 33.3%
21 1972 1 1 2 50.0% 11 7 18 61.1% 13 8 21 61.9% 3 0 3 100.0% 1970 — — — — 17 13 30 56.7% 1 3 4 25.0% — — — —
22 1973 3 1 4 75.0% 18 8 26 69.2% 16 9 25 64.0% 1 3 4 25.0% 1971 — — — — 27 11 38 71.1% 9 6 15 60.0% 0 2 2 0.0%
23 1974 6 1 7 85.7% 11 9 20 55.0% 17 9 26 65.4% 3 1 4 75.0% 1972 2 4 6 33.3% 9 9 18 50.0% 10 4 14 71.4% 0 1 1 0.0%
24 1975 — — — — 19 7 26 73.1% 4 3 7 57.1% — — — — 1973 — — — — — — — — 2 3 5 40.0% 6 3 9 66.7%
Career — 10 3 13 76.9% 88 50 138 63.8% 71 43 114 62.3% 7 4 11 63.6% — 2 4 6 33.3% 64 45 109 58.7% 30 27 57 52.6% 10 10 20 50.0%

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 Kazuko Sawamatsu Jill Cooper
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 1968 1503 104.1 — — — — +72 -22 -18 45.0% -0.23 0–2 — — +0.30
20 1971 1827 139.8 — — — — — -118 0 59.3% +0.81 6–1 (86%) 1–0 — -2.27 1969 1563 120.2 — — — — -4 +8 -38 51.6% +0.50 1–3 (25%) — — +0.29
21 1972 1848 149.8 — — — — -200 -59 +3 61.1% +1.22 5–4 (56%) — — -3.87 1970 1637 131.2 — — — — — +37 -131 54.8% +0.47 3–6 (33%) — — +0.24
22 1973 1826 145.5 — — — — -160 +61 +45 60.9% +0.99 10–5 (67%) 3–4 (43%) 104.0 +1.60 1971 1755 149.8 — — — — — +87 -136 69.2% +1.79 2–9 (18%) 2–0 — +0.56
23 1974 1900 150.9 — — — — -79 -49 +35 61.7% +0.94 8–2 (80%) 4–3 (57%) 106.4 -3.51 1972 1782 139.2 — — — — -234 +33 -67 56.8% +0.69 3–4 (43%) — — -2.79
24 1975 1955 150.1 — — — — — +26 -50 64.9% +1.09 6–2 (75%) 3–1 (75%) 106.5 -0.94 1973 1811 126.8 — — — — -140 — -88 53.1% +0.34 3–1 (75%) — — +0.26
Career — 1955 150.4 — — — — -131 +6 +3 61.3% +1.01 41–21 (66%) 11–8 (58%) 110.7 -3.61 — 1843 138.6 — — — — -106 +45 -80 57.7% +0.82 12–25 (32%) 2–0 — -0.60

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.