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

Olga Morozova vs Valerie Ziegenfuss H2H: 3-0

Olga Morozova holds a 3–0 lead over Valerie Ziegenfuss in their WTA head-to-head. Across 3 main-draw meetings, Olga Morozova leads 2–0 on carpet and 1–0 on grass. Most recently, Olga Morozova won the 1975 Boston round of 16 6-2 6-0.

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Olga Morozova
URS Age 77 Right-Handed 170 cm / 5'7"
H2H
3 – 0
3 main-draw meetings
Valerie Ziegenfuss
USA Age 77

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Olga Morozova 6-2 6-0 Valerie Ziegenfuss Match data Mar 7, 1975* R16 Boston WTA 250 Carpet
Olga Morozova 6-0 6-2 Valerie Ziegenfuss Match data Mar 22, 1974* R16 Akron WTA 250 Carpet
Olga Morozova 6-2 6-3 Valerie Ziegenfuss Match data Jun 23, 1973* SF London Rothmans WTA 250 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
Olga Morozova — #7 — 2,221 325 107 75.2% 0 0 0 8 29 37
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 Olga Morozova Valerie Ziegenfuss
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 1968 14–10 58.3% — 1,571 0 1 1968 35–24 59.3% — 1,605 0 0
20 1969 30–10 75.0% — 1,766 0 5 1969 28–24 53.8% — 1,733 0 1
21 1970 41–9 82.0% — 1,912 0 13 1970 40–28 58.8% — 1,779 0 2
22 1971 22–8 73.3% — 1,873 0 17 1971 23–29 44.2% — 1,798 0 3
23 1972 53–13 80.3% — 1,975 0 24 1972 26–24 52.0% — 1,820 0 3
24 1973 35–11 76.1% — 2,014 0 28 1973 33–29 53.2% — 1,761 0 3
25 1974 55–13 80.9% — 2,209 0 32 1974 12–14 46.2% — 1,788 0 3
26 1975 41–18 69.5% #7 2,068 0 34 1975 16–16 50.0% — 1,830 0 3
27 1976 25–10 71.4% #9 2,046 0 35 1976 12–20 37.5% — 1,746 0 3
28 1977 6–5 54.5% — 2,030 0 35 1977 2–12 14.3% — 1,677 0 3
29 — — — — — — — 1978 3–11 21.4% — 1,654 0 3
30 1979 2–0 100.0% — 2,041 0 36 1979 1–1 50.0% — 1,667 0 3
31 1980 1–0 100.0% — 2,043 0 37 — — — — — — —

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 Olga Morozova 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 — — — — 8 4 12 66.7% 2 3 5 40.0% 4 3 7 57.1% 1968 5 4 9 55.6% 16 9 25 64.0% 13 9 22 59.1% 1 2 3 33.3%
20 1969 — — — — 12 7 19 63.2% 6 3 9 66.7% 9 0 9 100.0% 1969 5 6 11 45.5% 12 8 20 60.0% 10 8 18 55.6% 1 2 3 33.3%
21 1970 — — — — 11 2 13 84.6% 15 6 21 71.4% 9 1 10 90.0% 1970 12 7 19 63.2% 13 8 21 61.9% 12 8 20 60.0% 2 3 5 40.0%
22 1971 — — — — 7 2 9 77.8% 10 6 16 62.5% 4 0 4 100.0% 1971 4 6 10 40.0% 10 7 17 58.8% 6 6 12 50.0% 3 10 13 23.1%
23 1972 — — — — 13 4 17 76.5% 30 7 37 81.1% 5 2 7 71.4% 1972 6 4 10 60.0% 9 7 16 56.3% 4 4 8 50.0% 7 9 16 43.8%
24 1973 — — — — 11 3 14 78.6% 12 3 15 80.0% 12 5 17 70.6% 1973 5 6 11 45.5% 6 6 12 50.0% 8 4 12 66.7% 12 12 24 50.0%
25 1974 — — — — 15 6 21 71.4% 24 5 29 82.8% 16 2 18 88.9% 1974 3 4 7 42.9% 0 1 1 0.0% 0 1 1 0.0% 9 8 17 52.9%
26 1975 6 3 9 66.7% 10 4 14 71.4% 9 3 12 75.0% 13 7 20 65.0% 1975 8 6 14 57.1% 3 3 6 50.0% 1 1 2 50.0% 4 6 10 40.0%
27 1976 2 1 3 66.7% 1 1 2 50.0% 13 2 15 86.7% 9 6 15 60.0% 1976 3 3 6 50.0% 4 8 12 33.3% 4 4 8 50.0% 1 5 6 16.7%
28 1977 — — — — — — — — — — — — 6 5 11 54.5% 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 — — — — 2 0 2 100.0% — — — — — — — — 1979 1 1 2 50.0% — — — — — — — — — — — —
Career — 8 4 12 66.7% 90 33 123 73.2% 121 38 159 76.1% 87 31 118 73.7% — 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 Olga Morozova 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 1571 109.1 — — — — -7 +18 -53 54.7% +0.41 4–3 (57%) — — +1.00 1968 1605 119.1 — — — — -45 +58 +13 57.4% +0.80 9–4 (69%) — — -0.64
20 1969 1766 133.7 — — — — +72 -72 -119 70.9% +1.50 5–3 (63%) — — +1.35 1969 1734 126.4 — — — — -175 -30 +9 51.4% +0.32 6–3 (67%) — — -2.24
21 1970 1913 140.4 — — — — -10 -85 -65 75.9% +1.89 8–4 (67%) — — +1.77 1970 1780 133.1 — — — — -34 -31 +26 55.6% +0.45 11–4 (73%) 0–1 — -2.50
22 1971 1874 134.0 — — — — +62 -36 -12 67.6% +1.50 6–2 (75%) 1–1 — +0.73 1971 1799 143.5 — — — — -114 +2 0 46.0% -0.35 5–8 (38%) 3–2 (60%) 99.7 -6.44
23 1972 1975 148.0 — — — — -47 -51 +58 75.2% +2.13 10–5 (67%) 0–4 (0%) 99.6 +4.28 1972 1821 139.7 — — — — -47 -20 -41 48.2% +0.09 9–3 (75%) 4–4 (50%) 105.3 -5.05
24 1973 2014 149.3 — — — — -72 -48 +78 71.7% +1.76 8–6 (57%) 0–1 — +1.92 1973 1761 143.5 — — — — -2 +54 +48 54.3% +0.18 7–9 (44%) 4–5 (44%) 95.0 -5.77
25 1974 2210 166.2 — — — — -35 -160 +47 74.5% +1.65 12–3 (80%) 4–1 (80%) 111.8 -9.30 1974 1789 134.2 — — — — +8 — — 46.6% -0.29 3–3 (50%) 0–3 (0%) 97.0 -2.64
26 1975 2069 159.9 — — — — +42 -19 +139 64.3% +1.22 12–3 (80%) 4–7 (36%) 101.0 -3.34 1975 1830 135.8 — — — — +53 -30 — 49.3% -0.35 6–5 (55%) 2–2 (50%) 99.8 -0.81
27 1976 2046 152.6 — — — — +6 — +210 66.2% +1.56 6–3 (67%) 1–3 (25%) 97.3 -2.07 1976 1746 126.6 — — — — +34 -51 +32 41.1% -0.78 3–6 (33%) 3–2 (60%) 97.3 -2.74
28 1977 2031 131.4 — — — — -6 — — 57.1% +0.43 1–0 1–1 — -1.67 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 2042 109.2 — — — — — — — 80.0% +1.80 1–0 1–0 — +0.03 1979 1667 111.1 — — — — — — — 40.0% -0.20 1–0 0–1 — -0.15
31 1980 2043 100.8 — — — — — — — 66.7% +1.00 1–0 0–1 — +0.05 — — — — — — — — — — — — — — — —
Career — 2221 154.4 — — — — -1 -65 +42 70.1% +1.58 74–32 (70%) 12–19 (39%) 104.4 -1.23 — 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.