H2H data updated: 2026-09-13 00:00 UTC
Valerie Ziegenfuss holds a 4–1 lead over Stephanie Defina in their WTA head-to-head. Across 5 main-draw meetings, they are tied 1–1 on carpet, while Valerie Ziegenfuss leads 2–0 on hard courts. Most recently, Valerie Ziegenfuss won the 1972 Denver round of 16 6-2 6-2.
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| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Valerie Ziegenfuss | 6-2 6-2 | Stephanie Defina | Match data | Aug 18, 1972* | R16 | Denver | WTA 250 | Hard |
| Valerie Ziegenfuss | 6-3 7-5 | Stephanie Defina | Match data | Jan 25, 1971* | R16 | Milwaukee | WTA 250 | Carpet |
| Valerie Ziegenfuss | 3-6 6-3 6-2 | Stephanie Defina | Match data | Jul 18, 1970* | SF | Bratislava | WTA 250 | Clay |
| Valerie Ziegenfuss | 6-3 6-2 | Stephanie Defina | Match data | Apr 5, 1970* | SF | San Juan | WTA 250 | Hard |
| Stephanie Defina | 6-4 7-5 | Valerie Ziegenfuss | Match data | Feb 23, 1969* | R16 | Boston | WTA 250 | Carpet |
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.
| 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 |
| Stephanie Defina | — | — | — | 1,818 | 93 | 62 | 60.0% | 0 | 0 | 0 | 0 | 7 | 7 |
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 | Stephanie Defina | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 19 | 1968 | 35–24 | 59.3% | — | 1,605 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 1969 | 28–24 | 53.8% | — | 1,733 | 0 | 1 | — | — | — | — | — | — | — |
| 21 | 1970 | 40–28 | 58.8% | — | 1,779 | 0 | 2 | — | — | — | — | — | — | — |
| 22 | 1971 | 23–29 | 44.2% | — | 1,798 | 0 | 3 | 1968 | 33–22 | 60.0% | — | 1,678 | 0 | 1 |
| 23 | 1972 | 26–24 | 52.0% | — | 1,820 | 0 | 3 | 1969 | 25–9 | 73.5% | — | 1,760 | 0 | 5 |
| 24 | 1973 | 33–29 | 53.2% | — | 1,761 | 0 | 3 | 1970 | 33–17 | 66.0% | — | 1,788 | 0 | 7 |
| 25 | 1974 | 12–14 | 46.2% | — | 1,788 | 0 | 3 | 1971 | 1–9 | 10.0% | — | 1,706 | 0 | 7 |
| 26 | 1975 | 16–16 | 50.0% | — | 1,830 | 0 | 3 | 1972 | 1–2 | 33.3% | — | 1,713 | 0 | 7 |
| 27 | 1976 | 12–20 | 37.5% | — | 1,746 | 0 | 3 | 1973 | 0–2 | 0.0% | — | 1,685 | 0 | 7 |
| 28 | 1977 | 2–12 | 14.3% | — | 1,677 | 0 | 3 | 1974 | 0–1 | 0.0% | — | 1,674 | 0 | 7 |
| 29 | 1978 | 3–11 | 21.4% | — | 1,654 | 0 | 3 | — | — | — | — | — | — | — |
| 30 | 1979 | 1–1 | 50.0% | — | 1,667 | 0 | 3 | — | — | — | — | — | — | — |
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 | Stephanie Defina | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Carpet | Yr | Hard | Clay | Grass | Carpet | |||||||||||||||||||||||||
| 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 | 5 | 4 | 9 | 55.6% | 16 | 9 | 25 | 64.0% | 13 | 9 | 22 | 59.1% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1969 | 5 | 6 | 11 | 45.5% | 12 | 8 | 20 | 60.0% | 10 | 8 | 18 | 55.6% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 1970 | 12 | 7 | 19 | 63.2% | 13 | 8 | 21 | 61.9% | 12 | 8 | 20 | 60.0% | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1971 | 4 | 6 | 10 | 40.0% | 10 | 7 | 17 | 58.8% | 6 | 6 | 12 | 50.0% | 3 | 10 | 13 | 23.1% | 1968 | 4 | 6 | 10 | 40.0% | 20 | 7 | 27 | 74.1% | 7 | 7 | 14 | 50.0% | 2 | 2 | 4 | 50.0% |
| 23 | 1972 | 6 | 4 | 10 | 60.0% | 9 | 7 | 16 | 56.3% | 4 | 4 | 8 | 50.0% | 7 | 9 | 16 | 43.8% | 1969 | 1 | 1 | 2 | 50.0% | 17 | 5 | 22 | 77.3% | — | — | — | — | 6 | 2 | 8 | 75.0% |
| 24 | 1973 | 5 | 6 | 11 | 45.5% | 6 | 6 | 12 | 50.0% | 8 | 4 | 12 | 66.7% | 12 | 12 | 24 | 50.0% | 1970 | 4 | 3 | 7 | 57.1% | 26 | 9 | 35 | 74.3% | 1 | 2 | 3 | 33.3% | 2 | 2 | 4 | 50.0% |
| 25 | 1974 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | 9 | 8 | 17 | 52.9% | 1971 | — | — | — | — | 0 | 2 | 2 | 0.0% | 0 | 1 | 1 | 0.0% | 1 | 6 | 7 | 14.3% |
| 26 | 1975 | 8 | 6 | 14 | 57.1% | 3 | 3 | 6 | 50.0% | 1 | 1 | 2 | 50.0% | 4 | 6 | 10 | 40.0% | 1972 | 1 | 1 | 2 | 50.0% | 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% | 1973 | 0 | 1 | 1 | 0.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 28 | 1977 | 0 | 1 | 1 | 0.0% | 0 | 4 | 4 | 0.0% | 0 | 1 | 1 | 0.0% | 2 | 6 | 8 | 25.0% | 1974 | — | — | — | — | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% |
| 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% | — | 10 | 12 | 22 | 45.5% | 63 | 24 | 87 | 72.4% | 8 | 11 | 19 | 42.1% | 11 | 13 | 24 | 45.8% |
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 | Stephanie Defina | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 1605 | 119.1 | — | — | — | — | -45 | +58 | +13 | 57.4% | +0.80 | 9–4 (69%) | — | — | -0.64 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 1969 | 1734 | 126.4 | — | — | — | — | -175 | -30 | +9 | 51.4% | +0.32 | 6–3 (67%) | — | — | -2.24 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 21 | 1970 | 1780 | 133.1 | — | — | — | — | -34 | -31 | +26 | 55.6% | +0.45 | 11–4 (73%) | 0–1 | — | -2.50 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1971 | 1799 | 143.5 | — | — | — | — | -114 | +2 | 0 | 46.0% | -0.35 | 5–8 (38%) | 3–2 (60%) | 99.7 | -6.44 | 1968 | 1678 | 117.2 | — | — | — | — | -196 | +95 | -126 | 56.8% | +0.45 | 13–9 (59%) | — | — | -1.36 |
| 23 | 1972 | 1821 | 139.7 | — | — | — | — | -47 | -20 | -41 | 48.2% | +0.09 | 9–3 (75%) | 4–4 (50%) | 105.3 | -5.05 | 1969 | 1761 | 138.3 | — | — | — | — | -91 | +61 | — | 71.6% | +1.86 | 3–3 (50%) | — | — | +0.05 |
| 24 | 1973 | 1761 | 143.5 | — | — | — | — | -2 | +54 | +48 | 54.3% | +0.18 | 7–9 (44%) | 4–5 (44%) | 95.0 | -5.77 | 1970 | 1789 | 133.4 | — | — | — | — | -88 | +98 | -231 | 62.9% | +1.05 | 7–4 (64%) | 1–0 | — | +0.80 |
| 25 | 1974 | 1789 | 134.2 | — | — | — | — | +8 | — | — | 46.6% | -0.29 | 3–3 (50%) | 0–3 (0%) | 97.0 | -2.64 | 1971 | 1707 | 111.7 | — | — | — | — | -58 | — | — | 10.0% | -2.90 | — | — | — | -0.83 |
| 26 | 1975 | 1830 | 135.8 | — | — | — | — | +53 | -30 | — | 49.3% | -0.35 | 6–5 (55%) | 2–2 (50%) | 99.8 | -0.81 | 1972 | 1714 | 107.0 | — | — | — | — | — | — | — | 33.3% | -1.83 | — | 1–0 | — | -0.95 |
| 27 | 1976 | 1746 | 126.6 | — | — | — | — | +34 | -51 | +32 | 41.1% | -0.78 | 3–6 (33%) | 3–2 (60%) | 97.3 | -2.74 | 1973 | 1686 | 100.5 | — | — | — | — | — | — | — | 0.0% | -3.50 | — | — | — | -0.40 |
| 28 | 1977 | 1678 | 124.2 | — | — | — | — | +10 | -22 | — | 16.7% | -2.17 | 1–1 | 1–3 (25%) | — | -1.87 | 1974 | 1675 | 102.4 | — | — | — | — | — | — | — | 0.0% | -1.50 | — | 0–1 | — | -0.06 |
| 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 | — | 1819 | 129.6 | — | — | — | — | -120 | +87 | -145 | 57.7% | +0.65 | 23–16 (59%) | 2–1 (67%) | 104.5 | -1.80 |
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Rosie Casals | 0 | 26 | 26 | Apr 14, 1978 | H2H |
| Francoise Durr | 3 | 12 | 15 | Jan 6, 1977 | H2H |
| Nancy Richey | 1 | 11 | 12 | Oct 11, 1975 | H2H |
| Kerry Reid | 2 | 9 | 11 | Sep 14, 1973 | H2H |
| Virginia Wade | 2 | 8 | 10 | Oct 12, 1978 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Linda Tuero | 2 | 4 | 6 | May 30, 1970 | H2H |
| Valerie Ziegenfuss | 1 | 4 | 5 | Aug 18, 1972 | H2H |
| Mary Ann Eisel | 1 | 4 | 5 | Jan 10, 1971 | H2H |
| Nancy Richey | 1 | 4 | 5 | Apr 11, 1970 | H2H |
| Virginia Wade | 1 | 3 | 4 | Feb 4, 1972 | H2H |