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

Valerie Ziegenfuss vs Brenda Kirk H2H: 1-1

Valerie Ziegenfuss and Brenda Kirk are tied 1–1 in their WTA head-to-head. Across 2 main-draw meetings, Valerie Ziegenfuss leads 1–0 on carpet, while Brenda Kirk leads 1–0 on hard courts. Most recently, Valerie Ziegenfuss won the 1973 Jersey Shore round of 32 6-2 6-1.

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Valerie Ziegenfuss
USA Age 77
H2H
1 – 1
2 main-draw meetings
Brenda Kirk
RSA

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Valerie Ziegenfuss 6-2 6-1 Brenda Kirk Match data Aug 16, 1973* R32 Jersey Shore WTA 250 Carpet
Brenda Kirk 8-6 6-0 Valerie Ziegenfuss Match data Jan 2, 1970* R16 Port Elizabeth 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
Valerie Ziegenfuss — — — 1,954 231 232 49.9% 0 0 0 0 3 3
Brenda Kirk — — — 1,790 102 116 46.8% 0 0 0 0 2 2

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 Valerie Ziegenfuss Brenda Kirk
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1968 1–4 20.0% — 1,460 0 0
18 — — — — — — — 1969 13–18 41.9% — 1,527 0 0
19 1968 35–24 59.3% — 1,605 0 0 1970 15–22 40.5% — 1,576 0 0
20 1969 28–24 53.8% — 1,733 0 1 1971 26–23 53.1% — 1,678 0 1
21 1970 40–28 58.8% — 1,779 0 2 1972 37–25 59.7% — 1,774 0 2
22 1971 23–29 44.2% — 1,798 0 3 1973 6–20 23.1% — 1,673 0 2
23 1972 26–24 52.0% — 1,820 0 3 1974 3–2 60.0% — 1,677 0 2
24 1973 33–29 53.2% — 1,761 0 3 — — — — — — —
25 1974 12–14 46.2% — 1,788 0 3 1976 1–1 50.0% — 1,682 0 2
26 1975 16–16 50.0% — 1,830 0 3 1977 0–1 0.0% — 1,665 0 2
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 Valerie Ziegenfuss Brenda Kirk
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 1 4 5 20.0% — — — — — — — — — — — —
18 — — — — — — — — — — — — — — — — — 1969 4 5 9 44.4% 2 4 6 33.3% 7 9 16 43.8% — — — —
19 1968 5 4 9 55.6% 16 9 25 64.0% 13 9 22 59.1% 1 2 3 33.3% 1970 5 5 10 50.0% 5 9 14 35.7% 5 8 13 38.5% — — — —
20 1969 5 6 11 45.5% 12 8 20 60.0% 10 8 18 55.6% 1 2 3 33.3% 1971 6 4 10 60.0% 11 11 22 50.0% 9 8 17 52.9% — — — —
21 1970 12 7 19 63.2% 13 8 21 61.9% 12 8 20 60.0% 2 3 5 40.0% 1972 12 3 15 80.0% 9 10 19 47.4% 7 7 14 50.0% 9 5 14 64.3%
22 1971 4 6 10 40.0% 10 7 17 58.8% 6 6 12 50.0% 3 10 13 23.1% 1973 3 7 10 30.0% 2 6 8 25.0% 1 3 4 25.0% 0 4 4 0.0%
23 1972 6 4 10 60.0% 9 7 16 56.3% 4 4 8 50.0% 7 9 16 43.8% 1974 1 1 2 50.0% — — — — — — — — — — — —
24 1973 5 6 11 45.5% 6 6 12 50.0% 8 4 12 66.7% 12 12 24 50.0% — — — — — — — — — — — — — — — — —
25 1974 3 4 7 42.9% 0 1 1 0.0% 0 1 1 0.0% 9 8 17 52.9% 1976 1 1 2 50.0% — — — — — — — — — — — —
26 1975 8 6 14 57.1% 3 3 6 50.0% 1 1 2 50.0% 4 6 10 40.0% 1977 0 1 1 0.0% — — — — — — — — — — — —
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 — 52 52 104 50.0% 76 64 140 54.3% 58 48 106 54.7% 42 65 107 39.3% — 33 31 64 51.6% 29 40 69 42.0% 29 35 64 45.3% 9 9 18 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 Valerie Ziegenfuss Brenda Kirk
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 1460 95.8 — — — — -15 — — 27.3% -1.55 0–1 — — +0.11
18 — — — — — — — — — — — — — — — — 1969 1528 115.7 — — — — +3 -45 +44 46.0% -0.36 2–3 (40%) — — +0.37
19 1968 1605 119.1 — — — — -45 +58 +13 57.4% +0.80 9–4 (69%) — — -0.64 1970 1577 119.6 — — — — +10 -102 +23 40.0% -0.74 4–2 (67%) — — -1.30
20 1969 1734 126.4 — — — — -175 -30 +9 51.4% +0.32 6–3 (67%) — — -2.24 1971 1678 130.6 — — — — -21 -84 +10 52.7% +0.15 6–6 (50%) 2–1 (67%) 102.9 +3.63
21 1970 1780 133.1 — — — — -34 -31 +26 55.6% +0.45 11–4 (73%) 0–1 — -2.50 1972 1775 136.1 — — — — +141 -190 -45 57.0% +0.40 8–7 (53%) 3–3 (50%) 101.4 +0.85
22 1971 1799 143.5 — — — — -114 +2 0 46.0% -0.35 5–8 (38%) 3–2 (60%) 99.7 -6.44 1973 1673 116.8 — — — — +33 -98 +38 24.6% -2.40 3–2 (60%) 4–1 (80%) 102.2 -2.93
23 1972 1821 139.7 — — — — -47 -20 -41 48.2% +0.09 9–3 (75%) 4–4 (50%) 105.3 -5.05 1974 1677 110.0 — — — — — — — 54.5% +0.45 1–0 — — +0.41
24 1973 1761 143.5 — — — — -2 +54 +48 54.3% +0.18 7–9 (44%) 4–5 (44%) 95.0 -5.77 — — — — — — — — — — — — — — — —
25 1974 1789 134.2 — — — — +8 — — 46.6% -0.29 3–3 (50%) 0–3 (0%) 97.0 -2.64 1976 1683 109.3 — — — — — — — 60.0% +0.80 0–1 1–0 — +0.05
26 1975 1830 135.8 — — — — +53 -30 — 49.3% -0.35 6–5 (55%) 2–2 (50%) 99.8 -0.81 1977 1666 100.7 — — — — — — — 33.3% +0.33 0–1 0–1 — +0.13
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 — 1954 139.2 — — — — -28 -1 +15 49.3% -0.01 63–50 (56%) 20–24 (45%) 101.1 -7.31 — 1791 128.6 — — — — +57 -115 +11 46.9% -0.33 24–23 (51%) 10–6 (63%) 103.8 +0.61

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.