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

Kazuko Sawamatsu vs Janet Newberry H2H: 2-1

Kazuko Sawamatsu holds a 2–1 lead over Janet Newberry in their WTA head-to-head. Across 3 main-draw meetings, they are tied 1–1 on grass, while Kazuko Sawamatsu leads 1–0 on clay. Most recently, Kazuko Sawamatsu won the 1975 Hamburg Open quarterfinal 6-4 2-6 6-3.

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Kazuko Sawamatsu
JPN Age 75 Right-Handed
H2H
2 – 1
3 main-draw meetings
Janet Newberry
USA Age 73 Right-Handed 170 cm / 5'7"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kazuko Sawamatsu 6-4 2-6 6-3 Janet Newberry Match data May 24, 1975* QF Hamburg Open WTA 250 Clay
Janet Newberry 6-3 6-3 Kazuko Sawamatsu Match data Dec 26, 1973 R16 Australian Open Grand Slam Grass
Kazuko Sawamatsu 6-2 6-8 6-4 Janet Newberry Match data Jun 25, 1971* R64 Wimbledon 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
Janet Newberry — — — 1,922 238 187 56.0% 0 0 0 1 7 8

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 Janet Newberry
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
14 — — — — — — — 1968 7–5 58.3% — 1,542 0 0
15 — — — — — — — 1969 13–6 68.4% — 1,631 0 2
16 — — — — — — — 1970 20–7 74.1% — 1,718 0 5
17 1968 9–7 56.2% — 1,556 0 0 1971 15–9 62.5% — 1,757 0 5
18 1969 16–8 66.7% — 1,674 0 1 1972 20–17 54.1% — 1,707 0 5
19 1970 10–8 55.6% — 1,727 0 2 1973 32–24 57.1% — 1,851 0 5
20 1971 18–10 64.3% — 1,826 0 3 1974 22–22 50.0% — 1,812 0 5
21 1972 28–16 63.6% — 1,848 0 6 1975 31–22 58.5% — 1,903 0 6
22 1973 38–21 64.4% — 1,825 0 6 1976 14–10 58.3% — 1,862 0 6
23 1974 37–20 64.9% — 1,900 0 8 1977 25–22 53.2% — 1,875 0 7
24 1975 23–10 69.7% — 1,954 0 9 1978 15–14 51.7% — 1,831 0 7
25 — — — — — — — 1979 12–21 36.4% — 1,680 0 7
26 — — — — — — — 1980 12–8 60.0% — 1,643 0 8

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 Janet Newberry
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 %
14 — — — — — — — — — — — — — — — — — 1968 7 5 12 58.3% — — — — — — — — — — — —
15 — — — — — — — — — — — — — — — — — 1969 12 4 16 75.0% — — — — 1 2 3 33.3% — — — —
16 — — — — — — — — — — — — — — — — — 1970 15 3 18 83.3% 2 1 3 66.7% 3 3 6 50.0% — — — —
17 1968 — — — — 9 5 14 64.3% 0 2 2 0.0% — — — — 1971 2 2 4 50.0% 1 1 2 50.0% 12 6 18 66.7% — — — —
18 1969 — — — — 13 6 19 68.4% 3 2 5 60.0% — — — — 1972 6 4 10 60.0% 6 6 12 50.0% 6 6 12 50.0% — — — —
19 1970 — — — — 3 4 7 42.9% 4 4 8 50.0% — — — — 1973 6 5 11 54.5% 10 5 15 66.7% 8 5 13 61.5% 8 9 17 47.1%
20 1971 — — — — 4 4 8 50.0% 14 6 20 70.0% — — — — 1974 4 5 9 44.4% 1 4 5 20.0% 8 4 12 66.7% 9 9 18 50.0%
21 1972 1 1 2 50.0% 11 7 18 61.1% 13 8 21 61.9% 3 0 3 100.0% 1975 7 5 12 58.3% 20 9 29 69.0% 3 2 5 60.0% 1 6 7 14.3%
22 1973 3 1 4 75.0% 18 8 26 69.2% 16 9 25 64.0% 1 3 4 25.0% 1976 1 2 3 33.3% 9 4 13 69.2% 2 2 4 50.0% 2 2 4 50.0%
23 1974 6 1 7 85.7% 11 9 20 55.0% 17 9 26 65.4% 3 1 4 75.0% 1977 4 4 8 50.0% 13 7 20 65.0% 3 3 6 50.0% 5 8 13 38.5%
24 1975 — — — — 19 7 26 73.1% 4 3 7 57.1% — — — — 1978 1 2 3 33.3% 7 5 12 58.3% 5 3 8 62.5% 2 4 6 33.3%
25 — — — — — — — — — — — — — — — — — 1979 2 4 6 33.3% 2 5 7 28.6% 5 5 10 50.0% 1 5 6 16.7%
26 — — — — — — — — — — — — — — — — — 1980 6 5 11 54.5% 1 1 2 50.0% 4 0 4 100.0% — — — —
Career — 10 3 13 76.9% 88 50 138 63.8% 71 43 114 62.3% 7 4 11 63.6% — 73 50 123 59.3% 72 48 120 60.0% 60 41 101 59.4% 28 43 71 39.4%

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 Janet Newberry
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
14 — — — — — — — — — — — — — — — — 1968 1542 104.3 — — — — +45 — — 55.6% +0.41 2–1 (67%) — — +0.69
15 — — — — — — — — — — — — — — — — 1969 1632 120.1 — — — — +106 — -86 67.4% +1.19 2–3 (40%) — — +1.11
16 — — — — — — — — — — — — — — — — 1970 1719 128.8 — — — — +177 -163 -147 70.0% +1.70 4–4 (50%) 0–1 — +3.95
17 1968 1556 119.1 — — — — — +59 — 56.3% +0.87 2–0 — — +0.07 1971 1758 132.0 — — — — +111 — -30 56.9% +0.65 4–1 (80%) — — +0.89
18 1969 1674 127.4 — — — — — +49 -122 64.7% +1.25 2–1 (67%) — — +0.72 1972 1707 131.6 — — — — +164 -98 -1 54.3% +0.39 5–4 (56%) 0–2 — -0.95
19 1970 1727 133.7 — — — — — -29 -107 59.1% +0.75 2–6 (25%) — — -1.68 1973 1852 140.9 — — — — -29 -44 -119 55.8% +0.08 11–8 (58%) 7–1 (88%) 106.5 -4.59
20 1971 1827 139.8 — — — — — -118 0 59.3% +0.81 6–1 (86%) 1–0 — -2.27 1974 1813 140.5 — — — — -4 -63 -20 50.5% +0.13 4–5 (44%) 5–5 (50%) 99.4 -2.47
21 1972 1848 149.8 — — — — -200 -59 +3 61.1% +1.22 5–4 (56%) — — -3.87 1975 1904 152.7 — — — — -63 +15 -117 57.6% +0.47 6–6 (50%) 6–1 (86%) 104.5 -5.60
22 1973 1826 145.5 — — — — -160 +61 +45 60.9% +0.99 10–5 (67%) 3–4 (43%) 104.0 +1.60 1976 1863 123.7 — — — — -83 +57 -40 51.8% -0.23 7–1 (88%) 3–1 (75%) 107.1 -1.77
23 1974 1900 150.9 — — — — -79 -49 +35 61.7% +0.94 8–2 (80%) 4–3 (57%) 106.4 -3.51 1977 1875 146.0 — — — — -74 +55 -101 52.8% +0.28 6–6 (50%) 2–5 (29%) 95.9 -3.22
24 1975 1955 150.1 — — — — — +26 -50 64.9% +1.09 6–2 (75%) 3–1 (75%) 106.5 -0.94 1978 1831 138.7 — — — — -69 +30 +11 50.7% +0.12 5–4 (56%) 0–4 (0%) 95.6 -2.30
25 — — — — — — — — — — — — — — — — 1979 1681 129.3 — — — — +2 +125 +112 39.1% -0.90 2–3 (40%) 4–4 (50%) 97.3 +0.41
26 — — — — — — — — — — — — — — — — 1980 1644 112.8 — — — — -10 — +207 60.0% +0.76 4–3 (57%) 1–1 — +2.97
Career — 1955 150.4 — — — — -131 +6 +3 61.3% +1.01 41–21 (66%) 11–8 (58%) 110.7 -3.61 — 1922 142.9 — — — — +13 +8 -28 54.9% +0.32 62–49 (56%) 28–25 (53%) 101.7 -2.59

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.