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

Rosie Casals vs Valerie Ziegenfuss H2H: 26-0

Rosie Casals holds a 26–0 lead over Valerie Ziegenfuss in their WTA head-to-head. Across 26 main-draw meetings, Rosie Casals leads 10–0 on carpet and 7–0 on grass. Most recently, Rosie Casals won the 1978 Hilton Head round of 16 6-4 6-4.

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Rosie Casals
USA Age 77 Right-Handed 159 cm / 5'3"
H2H
26 – 0
26 main-draw meetings
Valerie Ziegenfuss
USA Age 77

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Rosie Casals 6-4 6-4 Valerie Ziegenfuss Match data Apr 14, 1978* R16 Hilton Head WTA 250 Clay
Rosie Casals 6-3 6-3 Valerie Ziegenfuss Match data Jun 24, 1977* R64 Wimbledon Grand Slam Grass
Rosie Casals 6-2 6-3 Valerie Ziegenfuss Match data Feb 4, 1977* R16 Seattle WTA 250 Carpet
Rosie Casals 6-3 6-1 Valerie Ziegenfuss Match data Jan 16, 1976* R16 Houston WTA 250 Hard
Rosie Casals 6-1 6-4 Valerie Ziegenfuss Match data Mar 2, 1974* QF Chicago WTA 250 Carpet
Rosie Casals 8-5 Valerie Ziegenfuss Match data Apr 3, 1973* BR Tucson WTA 250 Hard
Rosie Casals 7-5 6-4 Valerie Ziegenfuss Match data Feb 26, 1973* R16 Indianapolis WTA 250 Carpet
Rosie Casals 6-1 7-5 Valerie Ziegenfuss Match data Feb 3, 1973* QF Bethesda WTA 250 Carpet
Rosie Casals 6-2 6-1 Valerie Ziegenfuss Match data Jan 28, 1973* QF Los Angeles WTA 500 Carpet
Rosie Casals 6-1 6-4 Valerie Ziegenfuss Match data Jan 22, 1973* BR San Francisco WTA 250 Carpet
Rosie Casals 6-4 5-7 6-3 Valerie Ziegenfuss Match data Dec 12, 1972* SF New York WTA 250 Carpet
Rosie Casals 6-3 6-4 Valerie Ziegenfuss Match data Sep 5, 1972* R32 US Open Grand Slam Grass
Rosie Casals 6-2 6-2 Valerie Ziegenfuss Match data Aug 6, 1972* SF Columbus WTA 250 Clay
Rosie Casals 6-1 6-4 Valerie Ziegenfuss Match data Feb 24, 1972 R16 Washington Open WTA 250 Carpet
Rosie Casals 6-4 6-1 Valerie Ziegenfuss Match data Feb 22, 1972* F Oklahoma City WTA 250 Carpet
Rosie Casals 6-2 6-4 Valerie Ziegenfuss Match data Dec 12, 1971* SF ASB Classic WTA 250 Grass
Rosie Casals 5-7 6-3 6-2 Valerie Ziegenfuss Match data Dec 6, 1971* QF Christchurch WTA 250 Grass
Rosie Casals 6-3 6-3 Valerie Ziegenfuss Match data Aug 17, 1971* QF Canadian Open WTA 250 Clay
Rosie Casals 6-2 6-1 Valerie Ziegenfuss Match data Jun 17, 1971* R32 Queen's Club Championships WTA 250 Grass
Rosie Casals 0-6 7-5 6-3 Valerie Ziegenfuss Match data Apr 27, 1971* SF San Diego WTA 500 Hard
Rosie Casals 6-1 6-2 Valerie Ziegenfuss Match data Mar 2, 1971* R16 Boston WTA 250 Carpet
Rosie Casals 6-2 6-2 Valerie Ziegenfuss Match data Feb 22, 1971* QF Fort Lauderdale WTA 250 Clay
Rosie Casals 6-1 7-5 Valerie Ziegenfuss Match data Sep 28, 1970* QF Houston WTA 250 Clay
Rosie Casals 6-2 6-4 Valerie Ziegenfuss Match data Sep 26, 1969* R16 Pacific Southwest Championships WTA 500 Hard
Rosie Casals 6-1 7-5 Valerie Ziegenfuss Match data Jun 25, 1969* R128 Wimbledon Grand Slam Grass
Rosie Casals 6-3 7-5 Valerie Ziegenfuss Match data Jun 26, 1968* R128 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
Rosie Casals #207 #6 — 2,212 594 322 64.8% 0 0 0 2 10 12
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 Rosie Casals Valerie Ziegenfuss
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 1968 36–14 72.0% — 1,750 0 1 1968 35–24 59.3% — 1,605 0 0
20 1969 42–19 68.9% — 1,877 0 1 1969 28–24 53.8% — 1,733 0 1
21 1970 52–21 71.2% — 2,043 0 4 1970 40–28 58.8% — 1,779 0 2
22 1971 92–31 74.8% — 2,172 0 7 1971 23–29 44.2% — 1,798 0 3
23 1972 64–26 71.1% — 2,105 0 10 1972 26–24 52.0% — 1,820 0 3
24 1973 81–28 74.3% — 2,139 0 12 1973 33–29 53.2% — 1,761 0 3
25 1974 43–16 72.9% — 2,140 0 12 1974 12–14 46.2% — 1,788 0 3
26 1975 20–14 58.8% — 2,004 0 12 1975 16–16 50.0% — 1,830 0 3
27 1976 39–17 69.6% #6 2,127 0 12 1976 12–20 37.5% — 1,746 0 3
28 1977 41–20 67.2% #6 2,054 0 12 1977 2–12 14.3% — 1,677 0 3
29 1978 24–15 61.5% — 2,011 0 12 1978 3–11 21.4% — 1,654 0 3
30 1979 19–26 42.2% — 1,826 0 12 1979 1–1 50.0% — 1,667 0 3
31 1980 14–25 35.9% — 1,677 0 12 — — — — — — —
32 1981 12–14 46.2% — 1,685 0 12 — — — — — — —
33 1982 4–8 33.3% — 1,666 0 12 — — — — — — —
34 1983 9–12 42.9% — 1,660 0 12 — — — — — — —
35 1984 1–4 20.0% #172 1,608 0 12 — — — — — — —
36 1985 1–4 20.0% — 1,573 0 12 — — — — — — —
37 1986 0–2 0.0% #207 1,546 0 12 — — — — — — —
39 1988 0–2 0.0% — 1,522 0 12 — — — — — — —
40 1989 0–2 0.0% — 1,499 0 12 — — — — — — —
41 1990 0–1 0.0% — 1,490 0 12 — — — — — — —
42 1991 0–1 0.0% — 1,475 0 12 — — — — — — —

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 Rosie Casals 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 %
19 1968 9 2 11 81.8% 5 2 7 71.4% 18 8 26 69.2% 4 2 6 66.7% 1968 5 4 9 55.6% 16 9 25 64.0% 13 9 22 59.1% 1 2 3 33.3%
20 1969 4 4 8 50.0% 15 6 21 71.4% 22 7 29 75.9% 1 2 3 33.3% 1969 5 6 11 45.5% 12 8 20 60.0% 10 8 18 55.6% 1 2 3 33.3%
21 1970 8 3 11 72.7% 29 8 37 78.4% 13 6 19 68.4% 2 4 6 33.3% 1970 12 7 19 63.2% 13 8 21 61.9% 12 8 20 60.0% 2 3 5 40.0%
22 1971 14 4 18 77.8% 25 10 35 71.4% 22 8 30 73.3% 31 9 40 77.5% 1971 4 6 10 40.0% 10 7 17 58.8% 6 6 12 50.0% 3 10 13 23.1%
23 1972 16 6 22 72.7% 11 6 17 64.7% 13 6 19 68.4% 24 8 32 75.0% 1972 6 4 10 60.0% 9 7 16 56.3% 4 4 8 50.0% 7 9 16 43.8%
24 1973 18 5 23 78.3% 20 5 25 80.0% 12 4 16 75.0% 31 14 45 68.9% 1973 5 6 11 45.5% 6 6 12 50.0% 8 4 12 66.7% 12 12 24 50.0%
25 1974 6 4 10 60.0% 8 3 11 72.7% 6 2 8 75.0% 23 7 30 76.7% 1974 3 4 7 42.9% 0 1 1 0.0% 0 1 1 0.0% 9 8 17 52.9%
26 1975 2 4 6 33.3% 5 4 9 55.6% 7 2 9 77.8% 6 4 10 60.0% 1975 8 6 14 57.1% 3 3 6 50.0% 1 1 2 50.0% 4 6 10 40.0%
27 1976 4 2 6 66.7% 3 1 4 75.0% 7 2 9 77.8% 25 12 37 67.6% 1976 3 3 6 50.0% 4 8 12 33.3% 4 4 8 50.0% 1 5 6 16.7%
28 1977 14 5 19 73.7% 7 4 11 63.6% 4 1 5 80.0% 16 10 26 61.5% 1977 0 1 1 0.0% 0 4 4 0.0% 0 1 1 0.0% 2 6 8 25.0%
29 1978 5 2 7 71.4% 2 1 3 66.7% 2 2 4 50.0% 15 10 25 60.0% 1978 0 4 4 0.0% 3 3 6 50.0% 0 2 2 0.0% 0 2 2 0.0%
30 1979 4 7 11 36.4% 1 3 4 25.0% 3 3 6 50.0% 11 13 24 45.8% 1979 1 1 2 50.0% — — — — — — — — — — — —
31 1980 3 7 10 30.0% — — — — 4 6 10 40.0% 7 12 19 36.8% — — — — — — — — — — — — — — — — —
32 1981 7 4 11 63.6% 0 3 3 0.0% 5 5 10 50.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — —
33 1982 1 3 4 25.0% 0 1 1 0.0% 2 3 5 40.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
34 1983 4 5 9 44.4% 1 1 2 50.0% 4 3 7 57.1% 0 3 3 0.0% — — — — — — — — — — — — — — — — —
35 1984 1 1 2 50.0% 0 2 2 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — —
36 1985 1 3 4 25.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
37 1986 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
39 1988 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
40 1989 0 1 1 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
41 1990 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
42 1991 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 121 75 196 61.7% 132 65 197 67.0% 144 69 213 67.6% 197 113 310 63.5% — 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 Rosie Casals 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
19 1968 1751 130.0 — — — — +41 -201 -25 68.8% +1.61 7–9 (44%) — — +0.46 1968 1605 119.1 — — — — -45 +58 +13 57.4% +0.80 9–4 (69%) — — -0.64
20 1969 1878 140.7 — — — — -130 -92 +93 64.3% +1.09 12–6 (67%) — — -4.14 1969 1734 126.4 — — — — -175 -30 +9 51.4% +0.32 6–3 (67%) — — -2.24
21 1970 2043 161.0 — — — — -151 +10 +19 68.1% +1.60 11–5 (69%) 1–3 (25%) 104.5 -10.75 1970 1780 133.1 — — — — -34 -31 +26 55.6% +0.45 11–4 (73%) 0–1 — -2.50
22 1971 2173 168.5 — — — — +114 -75 -19 71.2% +1.62 18–13 (58%) 6–9 (40%) 96.2 -13.17 1971 1799 143.5 — — — — -114 +2 0 46.0% -0.35 5–8 (38%) 3–2 (60%) 99.7 -6.44
23 1972 2106 158.7 — — — — +68 -51 +59 66.5% +1.41 15–7 (68%) 9–6 (60%) 102.7 -7.80 1972 1821 139.7 — — — — -47 -20 -41 48.2% +0.09 9–3 (75%) 4–4 (50%) 105.3 -5.05
24 1973 2139 165.9 — — — — +112 -17 +17 71.1% +1.70 15–13 (54%) 8–12 (40%) 96.6 -11.01 1973 1761 143.5 — — — — -2 +54 +48 54.3% +0.18 7–9 (44%) 4–5 (44%) 95.0 -5.77
25 1974 2140 162.3 — — — — +99 +10 +10 69.8% +1.25 6–8 (43%) 5–4 (56%) 96.0 -8.65 1974 1789 134.2 — — — — +8 — — 46.6% -0.29 3–3 (50%) 0–3 (0%) 97.0 -2.64
26 1975 2004 147.2 — — — — +23 +89 +133 59.8% +0.83 5–9 (36%) 3–4 (43%) 89.5 -3.22 1975 1830 135.8 — — — — +53 -30 — 49.3% -0.35 6–5 (55%) 2–2 (50%) 99.8 -0.81
27 1976 2127 162.3 — — — — +41 -44 +54 65.5% +1.01 7–4 (64%) 6–3 (67%) 102.3 -7.96 1976 1746 126.6 — — — — +34 -51 +32 41.1% -0.78 3–6 (33%) 3–2 (60%) 97.3 -2.74
28 1977 2055 157.2 — — — — +115 -41 +133 64.5% +0.90 8–6 (57%) 6–5 (55%) 100.5 -6.67 1977 1678 124.2 — — — — +10 -22 — 16.7% -2.17 1–1 1–3 (25%) — -1.87
29 1978 2011 156.1 — — — — +88 -37 +114 57.0% +0.57 10–7 (59%) 1–5 (17%) 95.9 -4.25 1978 1654 130.9 — — — — -20 +22 — 29.4% -1.50 2–4 (33%) 3–1 (75%) 99.1 -2.61
30 1979 1826 144.2 — — — — +54 +112 +237 46.6% -0.42 7–10 (41%) 6–2 (75%) 94.5 -3.11 1979 1667 111.1 — — — — — — — 40.0% -0.20 1–0 0–1 — -0.15
31 1980 1678 130.2 — — — — +17 — +237 40.4% -0.67 3–8 (27%) 3–8 (27%) 89.2 -1.94 — — — — — — — — — — — — — — — —
32 1981 1685 134.1 — — — — +86 +184 +145 46.0% +0.16 5–6 (45%) 0–4 (0%) 92.6 +0.30 — — — — — — — — — — — — — — — —
33 1982 1666 113.8 — — — — +42 — +126 39.3% -0.75 1–3 (25%) 0–2 — -0.59 — — — — — — — — — — — — — — — —
34 1983 1661 117.2 — — — — -26 — +150 44.9% -0.27 3–4 (43%) 1–0 — -0.27 — — — — — — — — — — — — — — — —
35 1984 1608 94.3 — — — — — — — 18.2% -2.82 1–0 — — +0.56 — — — — — — — — — — — — — — — —
36 1985 1573 92.4 — — — — +8 — — 11.1% -2.78 0–1 0–1 — +0.27 — — — — — — — — — — — — — — — —
37 1986 1547 97.2 — — — — — — — 0.0% -3.00 — — — 0.00 — — — — — — — — — — — — — — — —
39 1988 1522 93.9 — — — — — — — 0.0% -4.25 — — — 0.00 — — — — — — — — — — — — — — — —
40 1989 1499 89.7 — — — — — — — 0.0% -4.50 — — — +0.13 — — — — — — — — — — — — — — — —
41 1990 1491 100.4 — — — — — — — 0.0% -2.50 — — — -0.03 — — — — — — — — — — — — — — — —
42 1991 1476 94.5 — — — — — — — 0.0% -4.50 — — — +0.17 — — — — — — — — — — — — — — — —
Career — 2212 159.2 — — — — +64 -31 +61 62.3% +0.97 134–119 (53%) 55–68 (45%) 91.2 -9.01 — 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.