Joy Schwikert
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Helle Sparre | 2 | 1 | 3 | Jan 9, 1975 | H2H |
| Jeanne Evert | 0 | 2 | 2 | Jul 17, 1975 | H2H |
| Patricia Bostrom | 2 | 0 | 2 | Feb 27, 1975 | H2H |
| Sally Greer | 1 | 1 | 2 | Aug 20, 1974 | H2H |
| Julie Heldman | 0 | 2 | 2 | Aug 8, 1974 | H2H |
H2H data updated: 2026-09-12 00:00 UTC
Joy Schwikert vs Valerie Ziegenfuss H2H: 0-1
Valerie Ziegenfuss holds a 1–0 lead over Joy Schwikert in their WTA head-to-head. Across 1 main-draw meeting, Valerie Ziegenfuss leads 1–0 on carpet. Most recently, Valerie Ziegenfuss won the 1973 Quincy round of 32 7-6 6-1.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Valerie Ziegenfuss | 7-6 6-1 | Joy Schwikert | Match data | Apr 14, 1973* | R32 | Quincy | 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.
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Joy Schwikert | — | — | — | 1,570 | 19 | 38 | 33.3% | 0 | 0 | 0 | 0 | 0 | 0 |
| 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.
| Joy Schwikert | Valerie Ziegenfuss | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1971 | 1–1 | 50.0% | — | 1,492 | 0 | 0 | 1968 | 35–24 | 59.3% | — | 1,605 | 0 | 0 |
| 1972 | 0–1 | 0.0% | — | 1,489 | 0 | 0 | 1969 | 28–24 | 53.8% | — | 1,733 | 0 | 1 |
| 1973 | 5–13 | 27.8% | — | 1,514 | 0 | 0 | 1970 | 40–28 | 58.8% | — | 1,779 | 0 | 2 |
| 1974 | 8–13 | 38.1% | — | 1,487 | 0 | 0 | 1971 | 23–29 | 44.2% | — | 1,798 | 0 | 3 |
| 1975 | 5–10 | 33.3% | — | 1,477 | 0 | 0 | 1972 | 26–24 | 52.0% | — | 1,820 | 0 | 3 |
| — | — | — | — | — | — | — | 1973 | 33–29 | 53.2% | — | 1,761 | 0 | 3 |
| — | — | — | — | — | — | — | 1974 | 12–14 | 46.2% | — | 1,788 | 0 | 3 |
| — | — | — | — | — | — | — | 1975 | 16–16 | 50.0% | — | 1,830 | 0 | 3 |
| — | — | — | — | — | — | — | 1976 | 12–20 | 37.5% | — | 1,746 | 0 | 3 |
| — | — | — | — | — | — | — | 1977 | 2–12 | 14.3% | — | 1,677 | 0 | 3 |
| — | — | — | — | — | — | — | 1978 | 3–11 | 21.4% | — | 1,654 | 0 | 3 |
| — | — | — | — | — | — | — | 1979 | 1–1 | 50.0% | — | 1,667 | 0 | 3 |
Surface Results by Career Season
Rows are aligned in career order because complete birth data is unavailable. 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.
| Joy Schwikert | Valerie Ziegenfuss | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | ||
| 1971 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — | 1968 | 5 | 4 | 9 | 55.6% | 16 | 9 | 25 | 64.0% | 13 | 9 | 22 | 59.1% | 1 | 2 | 3 | 33.3% |
| 1972 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | 1969 | 5 | 6 | 11 | 45.5% | 12 | 8 | 20 | 60.0% | 10 | 8 | 18 | 55.6% | 1 | 2 | 3 | 33.3% |
| 1973 | 1 | 5 | 6 | 16.7% | 2 | 5 | 7 | 28.6% | — | — | — | — | 2 | 3 | 5 | 40.0% | 1970 | 12 | 7 | 19 | 63.2% | 13 | 8 | 21 | 61.9% | 12 | 8 | 20 | 60.0% | 2 | 3 | 5 | 40.0% |
| 1974 | 4 | 2 | 6 | 66.7% | 2 | 4 | 6 | 33.3% | 0 | 4 | 4 | 0.0% | 1 | 2 | 3 | 33.3% | 1971 | 4 | 6 | 10 | 40.0% | 10 | 7 | 17 | 58.8% | 6 | 6 | 12 | 50.0% | 3 | 10 | 13 | 23.1% |
| 1975 | — | — | — | — | 1 | 2 | 3 | 33.3% | — | — | — | — | 3 | 1 | 4 | 75.0% | 1972 | 6 | 4 | 10 | 60.0% | 9 | 7 | 16 | 56.3% | 4 | 4 | 8 | 50.0% | 7 | 9 | 16 | 43.8% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | 5 | 6 | 11 | 45.5% | 6 | 6 | 12 | 50.0% | 8 | 4 | 12 | 66.7% | 12 | 12 | 24 | 50.0% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1974 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | 9 | 8 | 17 | 52.9% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1975 | 8 | 6 | 14 | 57.1% | 3 | 3 | 6 | 50.0% | 1 | 1 | 2 | 50.0% | 4 | 6 | 10 | 40.0% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1976 | 3 | 3 | 6 | 50.0% | 4 | 8 | 12 | 33.3% | 4 | 4 | 8 | 50.0% | 1 | 5 | 6 | 16.7% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1977 | 0 | 1 | 1 | 0.0% | 0 | 4 | 4 | 0.0% | 0 | 1 | 1 | 0.0% | 2 | 6 | 8 | 25.0% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1978 | 0 | 4 | 4 | 0.0% | 3 | 3 | 6 | 50.0% | 0 | 2 | 2 | 0.0% | 0 | 2 | 2 | 0.0% |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1979 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 6 | 9 | 15 | 40.0% | 5 | 11 | 16 | 31.2% | 0 | 4 | 4 | 0.0% | 6 | 6 | 12 | 50.0% | Career | 52 | 52 | 104 | 50.0% | 76 | 64 | 140 | 54.3% | 58 | 48 | 106 | 54.7% | 42 | 65 | 107 | 39.3% |
Advanced Statistics Comparison by Career Season
Rows are aligned in career order because complete birth data is unavailable. 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.
| Joy Schwikert | 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 |
| 1971 | 1492 | 98.8 | — | — | — | — | — | — | — | 33.3% | -2.33 | 0–1 | — | — | -0.02 | 1968 | 1605 | 119.1 | — | — | — | — | -45 | +58 | +13 | 57.4% | +0.80 | 9–4 (69%) | — | — | -0.64 |
| 1972 | 1490 | 98.0 | — | — | — | — | — | — | — | 0.0% | -4.00 | — | — | — | -0.21 | 1969 | 1734 | 126.4 | — | — | — | — | -175 | -30 | +9 | 51.4% | +0.32 | 6–3 (67%) | — | — | -2.24 |
| 1973 | 1515 | 118.3 | — | — | — | — | -12 | +9 | — | 27.0% | -2.00 | 1–2 (33%) | 1–1 | — | -0.97 | 1970 | 1780 | 133.1 | — | — | — | — | -34 | -31 | +26 | 55.6% | +0.45 | 11–4 (73%) | 0–1 | — | -2.50 |
| 1974 | 1487 | 105.6 | — | — | — | — | +53 | +24 | -15 | 40.8% | -0.51 | 3–4 (43%) | 0–2 | — | +1.91 | 1971 | 1799 | 143.5 | — | — | — | — | -114 | +2 | 0 | 46.0% | -0.35 | 5–8 (38%) | 3–2 (60%) | 99.7 | -6.44 |
| 1975 | 1478 | 110.3 | — | — | — | — | +172 | +34 | — | 34.4% | -0.91 | 1–1 | 2–1 (67%) | — | +1.09 | 1972 | 1821 | 139.7 | — | — | — | — | -47 | -20 | -41 | 48.2% | +0.09 | 9–3 (75%) | 4–4 (50%) | 105.3 | -5.05 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1973 | 1761 | 143.5 | — | — | — | — | -2 | +54 | +48 | 54.3% | +0.18 | 7–9 (44%) | 4–5 (44%) | 95.0 | -5.77 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1974 | 1789 | 134.2 | — | — | — | — | +8 | — | — | 46.6% | -0.29 | 3–3 (50%) | 0–3 (0%) | 97.0 | -2.64 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1975 | 1830 | 135.8 | — | — | — | — | +53 | -30 | — | 49.3% | -0.35 | 6–5 (55%) | 2–2 (50%) | 99.8 | -0.81 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1976 | 1746 | 126.6 | — | — | — | — | +34 | -51 | +32 | 41.1% | -0.78 | 3–6 (33%) | 3–2 (60%) | 97.3 | -2.74 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1977 | 1678 | 124.2 | — | — | — | — | +10 | -22 | — | 16.7% | -2.17 | 1–1 | 1–3 (25%) | — | -1.87 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1978 | 1654 | 130.9 | — | — | — | — | -20 | +22 | — | 29.4% | -1.50 | 2–4 (33%) | 3–1 (75%) | 99.1 | -2.61 |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1979 | 1667 | 111.1 | — | — | — | — | — | — | — | 40.0% | -0.20 | 1–0 | 0–1 | — | -0.15 |
| Career | 1570 | 111.9 | — | — | — | — | +43 | +19 | -15 | 34.1% | -1.16 | 5–8 (38%) | 3–4 (43%) | 97.4 | +3.27 | Career | 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.
Valerie Ziegenfuss
all rivalries →| 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 |