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

Janet Newberry vs Valerie Ziegenfuss H2H: 3-1

Janet Newberry holds a 3–1 lead over Valerie Ziegenfuss in their WTA head-to-head. Across 4 main-draw meetings, Janet Newberry leads 2–1 on hard courts and 1–0 on carpet. Most recently, Janet Newberry won the 1977 San Francisco round of 32 6-3 6-3.

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Janet Newberry
USA Age 73 Right-Handed 170 cm / 5'7"
H2H
3 – 1
4 main-draw meetings
Valerie Ziegenfuss
USA Age 77

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Janet Newberry 6-3 6-3 Valerie Ziegenfuss Match data Mar 3, 1977* R32 San Francisco WTA 250 Carpet
Valerie Ziegenfuss 6-4 3-6 7-5 Janet Newberry Match data Jan 24, 1974* R32 Mission Viejo WTA 250 Hard
Janet Newberry 6-2 6-4 Valerie Ziegenfuss Match data May 11, 1969* F Los Angeles Socal Chps WTA 250 Hard
Janet Newberry 6-1 7-5 Valerie Ziegenfuss Match data Oct 8, 1968* QF La Jolla Nationals WTA 250 Hard

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
Janet Newberry — — — 1,922 238 187 56.0% 0 0 0 1 7 8
Valerie Ziegenfuss — — — 1,954 231 232 49.9% 0 0 0 0 3 3

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 Janet Newberry Valerie Ziegenfuss
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 1971 15–9 62.5% — 1,757 0 5 — — — — — — —
18 1972 20–17 54.1% — 1,707 0 5 — — — — — — —
19 1973 32–24 57.1% — 1,851 0 5 1968 35–24 59.3% — 1,605 0 0
20 1974 22–22 50.0% — 1,812 0 5 1969 28–24 53.8% — 1,733 0 1
21 1975 31–22 58.5% — 1,903 0 6 1970 40–28 58.8% — 1,779 0 2
22 1976 14–10 58.3% — 1,862 0 6 1971 23–29 44.2% — 1,798 0 3
23 1977 25–22 53.2% — 1,875 0 7 1972 26–24 52.0% — 1,820 0 3
24 1978 15–14 51.7% — 1,831 0 7 1973 33–29 53.2% — 1,761 0 3
25 1979 12–21 36.4% — 1,680 0 7 1974 12–14 46.2% — 1,788 0 3
26 1980 12–8 60.0% — 1,643 0 8 1975 16–16 50.0% — 1,830 0 3
27 — — — — — — — 1976 12–20 37.5% — 1,746 0 3
28 — — — — — — — 1977 2–12 14.3% — 1,677 0 3
29 — — — — — — — 1978 3–11 21.4% — 1,654 0 3
30 — — — — — — — 1979 1–1 50.0% — 1,667 0 3

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 Janet Newberry Valerie Ziegenfuss
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 1971 2 2 4 50.0% 1 1 2 50.0% 12 6 18 66.7% — — — — — — — — — — — — — — — — — — — — —
18 1972 6 4 10 60.0% 6 6 12 50.0% 6 6 12 50.0% — — — — — — — — — — — — — — — — — — — — —
19 1973 6 5 11 54.5% 10 5 15 66.7% 8 5 13 61.5% 8 9 17 47.1% 1968 5 4 9 55.6% 16 9 25 64.0% 13 9 22 59.1% 1 2 3 33.3%
20 1974 4 5 9 44.4% 1 4 5 20.0% 8 4 12 66.7% 9 9 18 50.0% 1969 5 6 11 45.5% 12 8 20 60.0% 10 8 18 55.6% 1 2 3 33.3%
21 1975 7 5 12 58.3% 20 9 29 69.0% 3 2 5 60.0% 1 6 7 14.3% 1970 12 7 19 63.2% 13 8 21 61.9% 12 8 20 60.0% 2 3 5 40.0%
22 1976 1 2 3 33.3% 9 4 13 69.2% 2 2 4 50.0% 2 2 4 50.0% 1971 4 6 10 40.0% 10 7 17 58.8% 6 6 12 50.0% 3 10 13 23.1%
23 1977 4 4 8 50.0% 13 7 20 65.0% 3 3 6 50.0% 5 8 13 38.5% 1972 6 4 10 60.0% 9 7 16 56.3% 4 4 8 50.0% 7 9 16 43.8%
24 1978 1 2 3 33.3% 7 5 12 58.3% 5 3 8 62.5% 2 4 6 33.3% 1973 5 6 11 45.5% 6 6 12 50.0% 8 4 12 66.7% 12 12 24 50.0%
25 1979 2 4 6 33.3% 2 5 7 28.6% 5 5 10 50.0% 1 5 6 16.7% 1974 3 4 7 42.9% 0 1 1 0.0% 0 1 1 0.0% 9 8 17 52.9%
26 1980 6 5 11 54.5% 1 1 2 50.0% 4 0 4 100.0% — — — — 1975 8 6 14 57.1% 3 3 6 50.0% 1 1 2 50.0% 4 6 10 40.0%
27 — — — — — — — — — — — — — — — — — 1976 3 3 6 50.0% 4 8 12 33.3% 4 4 8 50.0% 1 5 6 16.7%
28 — — — — — — — — — — — — — — — — — 1977 0 1 1 0.0% 0 4 4 0.0% 0 1 1 0.0% 2 6 8 25.0%
29 — — — — — — — — — — — — — — — — — 1978 0 4 4 0.0% 3 3 6 50.0% 0 2 2 0.0% 0 2 2 0.0%
30 — — — — — — — — — — — — — — — — — 1979 1 1 2 50.0% — — — — — — — — — — — —
Career — 73 50 123 59.3% 72 48 120 60.0% 60 41 101 59.4% 28 43 71 39.4% — 52 52 104 50.0% 76 64 140 54.3% 58 48 106 54.7% 42 65 107 39.3%

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 Janet Newberry Valerie Ziegenfuss
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 1971 1758 132.0 — — — — +111 — -30 56.9% +0.65 4–1 (80%) — — +0.89 — — — — — — — — — — — — — — — —
18 1972 1707 131.6 — — — — +164 -98 -1 54.3% +0.39 5–4 (56%) 0–2 — -0.95 — — — — — — — — — — — — — — — —
19 1973 1852 140.9 — — — — -29 -44 -119 55.8% +0.08 11–8 (58%) 7–1 (88%) 106.5 -4.59 1968 1605 119.1 — — — — -45 +58 +13 57.4% +0.80 9–4 (69%) — — -0.64
20 1974 1813 140.5 — — — — -4 -63 -20 50.5% +0.13 4–5 (44%) 5–5 (50%) 99.4 -2.47 1969 1734 126.4 — — — — -175 -30 +9 51.4% +0.32 6–3 (67%) — — -2.24
21 1975 1904 152.7 — — — — -63 +15 -117 57.6% +0.47 6–6 (50%) 6–1 (86%) 104.5 -5.60 1970 1780 133.1 — — — — -34 -31 +26 55.6% +0.45 11–4 (73%) 0–1 — -2.50
22 1976 1863 123.7 — — — — -83 +57 -40 51.8% -0.23 7–1 (88%) 3–1 (75%) 107.1 -1.77 1971 1799 143.5 — — — — -114 +2 0 46.0% -0.35 5–8 (38%) 3–2 (60%) 99.7 -6.44
23 1977 1875 146.0 — — — — -74 +55 -101 52.8% +0.28 6–6 (50%) 2–5 (29%) 95.9 -3.22 1972 1821 139.7 — — — — -47 -20 -41 48.2% +0.09 9–3 (75%) 4–4 (50%) 105.3 -5.05
24 1978 1831 138.7 — — — — -69 +30 +11 50.7% +0.12 5–4 (56%) 0–4 (0%) 95.6 -2.30 1973 1761 143.5 — — — — -2 +54 +48 54.3% +0.18 7–9 (44%) 4–5 (44%) 95.0 -5.77
25 1979 1681 129.3 — — — — +2 +125 +112 39.1% -0.90 2–3 (40%) 4–4 (50%) 97.3 +0.41 1974 1789 134.2 — — — — +8 — — 46.6% -0.29 3–3 (50%) 0–3 (0%) 97.0 -2.64
26 1980 1644 112.8 — — — — -10 — +207 60.0% +0.76 4–3 (57%) 1–1 — +2.97 1975 1830 135.8 — — — — +53 -30 — 49.3% -0.35 6–5 (55%) 2–2 (50%) 99.8 -0.81
27 — — — — — — — — — — — — — — — — 1976 1746 126.6 — — — — +34 -51 +32 41.1% -0.78 3–6 (33%) 3–2 (60%) 97.3 -2.74
28 — — — — — — — — — — — — — — — — 1977 1678 124.2 — — — — +10 -22 — 16.7% -2.17 1–1 1–3 (25%) — -1.87
29 — — — — — — — — — — — — — — — — 1978 1654 130.9 — — — — -20 +22 — 29.4% -1.50 2–4 (33%) 3–1 (75%) 99.1 -2.61
30 — — — — — — — — — — — — — — — — 1979 1667 111.1 — — — — — — — 40.0% -0.20 1–0 0–1 — -0.15
Career — 1922 142.9 — — — — +13 +8 -28 54.9% +0.32 62–49 (56%) 28–25 (53%) 101.7 -2.59 — 1954 139.2 — — — — -28 -1 +15 49.3% -0.01 63–50 (56%) 20–24 (45%) 101.1 -7.31

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.