Barbara Hallquist
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Tracy Austin | 0 | 4 | 4 | Oct 9, 1980 | H2H |
| Wendy Turnbull | 1 | 3 | 4 | Sep 1, 1980 | H2H |
| Andrea Leand | 0 | 3 | 3 | Jun 24, 1983 | H2H |
| Barbara Potter | 0 | 3 | 3 | Mar 17, 1983 | H2H |
| Wendy White | 2 | 1 | 3 | Dec 3, 1982 | H2H |
H2H data updated: 2026-09-06 00:00 UTC
Barbara Hallquist vs Sandy Stap H2H: 0-1
Sandy Stap holds a 1–0 lead over Barbara Hallquist in their WTA head-to-head. Across 1 main-draw meeting, Sandy Stap leads 1–0 on grass. Most recently, Sandy Stap won the 1975 Haverford semifinal 6-4 6-3.
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 |
|---|---|---|---|---|---|---|---|---|
| Sandy Stap | 6-4 6-3 | Barbara Hallquist | Match data | Aug 23, 1975* | SF | Haverford | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Barbara Hallquist | — | — | — | 1,777 | 67 | 90 | 42.7% | 0 | 0 | 0 | 0 | 0 | 0 |
| Sandy Stap | — | — | — | 1,635 | 25 | 33 | 43.1% | 0 | 0 | 0 | 0 | 1 | 1 |
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 | Barbara Hallquist | Sandy Stap | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 15 | — | — | — | — | — | — | — | 1971 | 0–2 | 0.0% | — | 1,482 | 0 | 0 |
| 16 | 1973 | 2–1 | 66.7% | — | 1,516 | 0 | 0 | 1972 | 2–4 | 33.3% | — | 1,493 | 0 | 0 |
| 17 | 1974 | 2–3 | 40.0% | — | 1,500 | 0 | 0 | 1973 | 2–6 | 25.0% | — | 1,446 | 0 | 0 |
| 18 | 1975 | 3–1 | 75.0% | — | 1,541 | 0 | 0 | 1974 | 7–7 | 50.0% | — | 1,508 | 0 | 0 |
| 19 | 1976 | 0–1 | 0.0% | — | 1,530 | 0 | 0 | 1975 | 10–7 | 58.8% | — | 1,615 | 0 | 1 |
| 20 | 1977 | 4–2 | 66.7% | — | 1,577 | 0 | 0 | 1976 | 0–1 | 0.0% | — | 1,594 | 0 | 1 |
| 21 | 1978 | 8–9 | 47.1% | — | 1,615 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 1979 | 3–13 | 18.8% | — | 1,564 | 0 | 0 | 1978 | 3–3 | 50.0% | — | 1,579 | 0 | 1 |
| 23 | 1980 | 14–13 | 51.9% | — | 1,702 | 0 | 0 | 1979 | 1–3 | 25.0% | — | 1,541 | 0 | 1 |
| 24 | 1981 | 14–17 | 45.2% | — | 1,736 | 0 | 0 | — | — | — | — | — | — | — |
| 25 | 1982 | 12–14 | 46.2% | — | 1,706 | 0 | 0 | — | — | — | — | — | — | — |
| 26 | 1983 | 5–16 | 23.8% | — | 1,567 | 0 | 0 | — | — | — | — | — | — | — |
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 | Barbara Hallquist | Sandy Stap | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 % | |||
| 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1971 | — | — | — | — | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 16 | 1973 | 2 | 1 | 3 | 66.7% | — | — | — | — | — | — | — | — | — | — | — | — | 1972 | — | — | — | — | 1 | 1 | 2 | 50.0% | 1 | 3 | 4 | 25.0% | — | — | — | — |
| 17 | 1974 | 2 | 2 | 4 | 50.0% | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | 1973 | 1 | 2 | 3 | 33.3% | 1 | 3 | 4 | 25.0% | 0 | 1 | 1 | 0.0% | — | — | — | — |
| 18 | 1975 | — | — | — | — | — | — | — | — | 3 | 1 | 4 | 75.0% | — | — | — | — | 1974 | — | — | — | — | 4 | 4 | 8 | 50.0% | 0 | 1 | 1 | 0.0% | 0 | 1 | 1 | 0.0% |
| 19 | 1976 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 1975 | — | — | — | — | 1 | 3 | 4 | 25.0% | 5 | 0 | 5 | 100.0% | — | — | — | — |
| 20 | 1977 | — | — | — | — | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 1976 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 21 | 1978 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1979 | 3 | 4 | 7 | 42.9% | 0 | 1 | 1 | 0.0% | 0 | 6 | 6 | 0.0% | 0 | 2 | 2 | 0.0% | 1978 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 23 | 1980 | 7 | 8 | 15 | 46.7% | 2 | 2 | 4 | 50.0% | 5 | 3 | 8 | 62.5% | — | — | — | — | 1979 | 1 | 1 | 2 | 50.0% | — | — | — | — | — | — | — | — | 0 | 2 | 2 | 0.0% |
| 24 | 1981 | 7 | 6 | 13 | 53.8% | — | — | — | — | 7 | 6 | 13 | 53.8% | 0 | 5 | 5 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 1982 | 7 | 5 | 12 | 58.3% | 0 | 3 | 3 | 0.0% | 5 | 6 | 11 | 45.5% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 1983 | 3 | 8 | 11 | 27.3% | 0 | 3 | 3 | 0.0% | 1 | 3 | 4 | 25.0% | 1 | 2 | 3 | 33.3% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 34 | 38 | 72 | 47.2% | 3 | 12 | 15 | 20.0% | 22 | 28 | 50 | 44.0% | 1 | 9 | 10 | 10.0% | — | 2 | 3 | 5 | 40.0% | 7 | 14 | 21 | 33.3% | 6 | 6 | 12 | 50.0% | 0 | 3 | 3 | 0.0% |
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 | Barbara Hallquist | Sandy Stap | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| 15 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1971 | 1482 | 103.5 | — | — | — | — | — | — | — | 20.0% | -0.80 | 0–1 | — | — | +0.01 |
| 16 | 1973 | 1516 | 110.1 | — | — | — | — | +80 | — | — | 66.7% | +2.33 | — | — | — | +0.83 | 1972 | 1493 | 112.1 | — | — | — | — | — | — | +17 | 35.7% | -0.86 | 1–1 | — | — | +0.03 |
| 17 | 1974 | 1500 | 97.3 | — | — | — | — | +94 | — | — | 38.5% | -0.85 | 2–1 (67%) | 0–1 | — | +1.26 | 1973 | 1446 | 101.0 | — | — | — | — | +92 | +47 | — | 27.8% | -0.89 | 1–1 | 0–1 | — | +1.70 |
| 18 | 1975 | 1541 | 102.9 | — | — | — | — | — | — | +36 | 60.0% | +0.60 | 2–0 | 1–1 | — | +0.62 | 1974 | 1509 | 118.2 | — | — | — | — | — | +31 | — | 53.1% | +0.56 | 1–3 (25%) | 0–1 | — | +0.89 |
| 19 | 1976 | 1530 | 102.4 | — | — | — | — | — | — | — | 33.3% | -1.00 | 0–1 | — | — | +0.08 | 1975 | 1615 | 126.2 | — | — | — | — | — | -83 | -11 | 59.0% | +0.36 | 2–3 (40%) | 2–1 (67%) | 101.9 | +0.52 |
| 20 | 1977 | 1578 | 113.0 | — | — | — | — | — | — | — | 57.1% | +0.21 | 2–0 | 1–0 | — | +0.31 | 1976 | 1595 | 99.7 | — | — | — | — | — | — | — | 33.3% | -0.33 | 0–1 | — | — | +0.15 |
| 21 | 1978 | 1615 | 117.4 | — | — | — | — | +32 | — | -43 | 48.6% | -0.16 | 3–2 (60%) | 2–1 (67%) | — | +0.27 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 22 | 1979 | 1564 | 114.4 | — | — | — | — | +88 | — | -66 | 27.0% | -1.76 | 3–4 (43%) | 0–1 | — | -0.88 | 1978 | 1580 | 104.8 | — | — | — | — | — | — | — | 46.7% | +0.20 | 2–1 (67%) | 1–1 | — | +0.18 |
| 23 | 1980 | 1702 | 131.2 | — | — | — | — | -29 | -211 | -89 | 52.4% | -0.19 | 4–5 (44%) | 6–1 (86%) | 104.8 | -1.74 | 1979 | 1541 | 95.0 | — | — | — | — | -5 | — | — | 33.3% | -0.89 | 0–1 | — | — | +1.26 |
| 24 | 1981 | 1736 | 128.2 | — | — | — | — | -10 | — | -69 | 43.2% | -0.74 | 8–4 (67%) | 2–0 | — | -2.03 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 25 | 1982 | 1707 | 102.0 | — | — | — | — | -3 | -250 | -62 | 44.1% | -0.80 | 5–2 (71%) | 4–4 (50%) | 102.8 | -0.61 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 26 | 1983 | 1567 | 105.0 | — | — | — | — | +48 | -95 | +32 | 28.3% | -1.37 | 1–3 (25%) | 0–3 (0%) | 93.9 | +0.68 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | — | 1777 | 121.4 | — | — | — | — | +20 | -188 | -52 | 43.1% | -0.66 | 30–22 (58%) | 16–12 (57%) | 106.6 | -0.77 | — | 1636 | 118.0 | — | — | — | — | +37 | +7 | +1 | 45.9% | -0.05 | 7–12 (37%) | 3–4 (43%) | 96.0 | +8.17 |
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.
Sandy Stap
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Betsy Nagelsen | 1 | 1 | 2 | Apr 1, 1979 | H2H |
| Susan Hagey | 2 | 0 | 2 | Feb 17, 1978 | H2H |
| Barbara Downs | 1 | 1 | 2 | Jul 25, 1975 | H2H |
| Cecilia Martinez | 0 | 2 | 2 | Jul 4, 1975 | H2H |
| Joanne Russell | 0 | 2 | 2 | Jul 12, 1974 | H2H |