H2H data updated: 2026-09-14 00:00 UTC

Judy Chaloner vs Valerie Ziegenfuss H2H: 0-1

Valerie Ziegenfuss holds a 1–0 lead over Judy Chaloner in their WTA head-to-head. Across 1 main-draw meeting, Valerie Ziegenfuss leads 1–0 on hard courts. Most recently, Valerie Ziegenfuss won the 1975 Mission Viejo round of 64 6-3 6-1.

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Judy Chaloner
NZL Age 72
H2H
0 – 1
1 main-draw meetings
Valerie Ziegenfuss
USA Age 77

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Valerie Ziegenfuss 6-3 6-1 Judy Chaloner Match data Oct 1, 1975* R64 Mission Viejo 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
Judy Chaloner — — — 1,670 71 80 47.0% 0 0 0 0 7 7
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 Judy Chaloner Valerie Ziegenfuss
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 1971 0–1 0.0% — 1,499 0 0 — — — — — — —
18 1972 0–3 0.0% — 1,455 0 0 — — — — — — —
19 1973 5–8 38.5% — 1,458 0 1 1968 35–24 59.3% — 1,605 0 0
20 1974 3–6 33.3% — 1,455 0 3 1969 28–24 53.8% — 1,733 0 1
21 1975 17–20 45.9% — 1,514 0 4 1970 40–28 58.8% — 1,779 0 2
22 1976 6–4 60.0% — 1,556 0 6 1971 23–29 44.2% — 1,798 0 3
23 1977 9–9 50.0% — 1,595 0 7 1972 26–24 52.0% — 1,820 0 3
24 1978 15–11 57.7% — 1,625 0 7 1973 33–29 53.2% — 1,761 0 3
25 1979 5–6 45.5% — 1,613 0 7 1974 12–14 46.2% — 1,788 0 3
26 1980 3–2 60.0% — 1,622 0 7 1975 16–16 50.0% — 1,830 0 3
27 1981 8–10 44.4% — 1,541 0 7 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 Judy Chaloner 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 %
17 1971 — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
18 1972 0 1 1 0.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
19 1973 — — — — 2 3 5 40.0% 2 4 6 33.3% — — — — 1968 5 4 9 55.6% 16 9 25 64.0% 13 9 22 59.1% 1 2 3 33.3%
20 1974 — — — — 1 4 5 20.0% 0 2 2 0.0% — — — — 1969 5 6 11 45.5% 12 8 20 60.0% 10 8 18 55.6% 1 2 3 33.3%
21 1975 0 3 3 0.0% 7 4 11 63.6% 6 7 13 46.2% 0 1 1 0.0% 1970 12 7 19 63.2% 13 8 21 61.9% 12 8 20 60.0% 2 3 5 40.0%
22 1976 — — — — 3 1 4 75.0% 3 3 6 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 0 2 2 0.0% 4 3 7 57.1% 4 2 6 66.7% 1 2 3 33.3% 1972 6 4 10 60.0% 9 7 16 56.3% 4 4 8 50.0% 7 9 16 43.8%
24 1978 — — — — 0 1 1 0.0% 8 6 14 57.1% — — — — 1973 5 6 11 45.5% 6 6 12 50.0% 8 4 12 66.7% 12 12 24 50.0%
25 1979 — — — — 0 1 1 0.0% 5 5 10 50.0% — — — — 1974 3 4 7 42.9% 0 1 1 0.0% 0 1 1 0.0% 9 8 17 52.9%
26 1980 — — — — — — — — 3 2 5 60.0% — — — — 1975 8 6 14 57.1% 3 3 6 50.0% 1 1 2 50.0% 4 6 10 40.0%
27 1981 — — — — — — — — 0 1 1 0.0% — — — — 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 — 0 6 6 0.0% 17 19 36 47.2% 31 33 64 48.4% 1 3 4 25.0% — 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 Judy Chaloner 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
17 1971 1499 100.9 — — — — — — — 0.0% -6.00 — — — -0.22 — — — — — — — — — — — — — — — —
18 1972 1455 94.3 — — — — — — — 0.0% -3.17 — — — +0.26 — — — — — — — — — — — — — — — —
19 1973 1459 103.4 — — — — — +21 +63 46.2% -0.46 0–2 — — +2.51 1968 1605 119.1 — — — — -45 +58 +13 57.4% +0.80 9–4 (69%) — — -0.64
20 1974 1455 106.0 — — — — — -13 — 38.1% -0.57 1–2 (33%) — — +0.99 1969 1734 126.4 — — — — -175 -30 +9 51.4% +0.32 6–3 (67%) — — -2.24
21 1975 1515 112.2 — — — — +33 +66 +27 45.2% -0.35 6–4 (60%) 0–3 (0%) 101.4 +1.33 1970 1780 133.1 — — — — -34 -31 +26 55.6% +0.45 11–4 (73%) 0–1 — -2.50
22 1976 1557 108.8 — — — — — +63 +22 52.2% +0.26 3–0 (100%) 0–2 — +2.07 1971 1799 143.5 — — — — -114 +2 0 46.0% -0.35 5–8 (38%) 3–2 (60%) 99.7 -6.44
23 1977 1595 113.2 — — — — -146 +34 +40 51.4% +0.14 0–1 1–1 — +2.98 1972 1821 139.7 — — — — -47 -20 -41 48.2% +0.09 9–3 (75%) 4–4 (50%) 105.3 -5.05
24 1978 1626 116.9 — — — — — — +42 54.4% +0.42 4–1 (80%) 2–2 (50%) 104.0 +2.12 1973 1761 143.5 — — — — -2 +54 +48 54.3% +0.18 7–9 (44%) 4–5 (44%) 95.0 -5.77
25 1979 1614 98.5 — — — — — — +46 42.3% -1.23 3–1 (75%) 1–0 — +1.54 1974 1789 134.2 — — — — +8 — — 46.6% -0.29 3–3 (50%) 0–3 (0%) 97.0 -2.64
26 1980 1622 97.5 — — — — — — +46 54.5% -0.27 1–0 — — +0.78 1975 1830 135.8 — — — — +53 -30 — 49.3% -0.35 6–5 (55%) 2–2 (50%) 99.8 -0.81
27 1981 1541 98.8 — — — — — — — 43.2% -0.59 5–3 (63%) 1–2 (33%) — +0.65 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 — 1670 110.3 — — — — -66 +39 +40 46.3% -0.33 23–14 (62%) 5–10 (33%) 103.7 +10.01 — 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.