H2H data updated: 2026-10-27 00:00 UTC
Sandy Collins holds a 1–0 lead over K Allen in their WTA head-to-head. They have met 1 times in main draws. Most recently, Sandy Collins won the 1978 Edinburgh Scottish Chps round of 16 6-4 6-0.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Sandy Collins | 6-4 6-0 | K Allen | Match data | Jul 14, 1978* | R16 | Edinburgh Scottish Chps | WTA 250 | — |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sandy Collins | — | — | — | 1,824 | 90 | 152 | 37.2% | 0 | 0 | 0 | 0 | 0 | 0 |
| K Allen | — | — | — | 1,513 | 1 | 2 | 33.3% | 0 | 0 | 0 | 0 | 0 | 0 |
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Sandy Collins | K Allen | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles |
| 1973 | 1–1 | 50.0% | — | 1,497 | 0 | 0 | 1978 | 1–1 | 50.0% | — | 1,497 | 0 | 0 |
| 1978 | 7–7 | 50.0% | — | 1,541 | 0 | 0 | 1979 | 0–1 | 0.0% | — | 1,481 | 0 | 0 |
| 1979 | 2–7 | 22.2% | — | 1,498 | 0 | 0 | — | — | — | — | — | — | — |
| 1980 | 10–12 | 45.5% | — | 1,632 | 0 | 0 | — | — | — | — | — | — | — |
| 1981 | 25–20 | 55.6% | — | 1,787 | 0 | 0 | — | — | — | — | — | — | — |
| 1982 | 14–21 | 40.0% | — | 1,734 | 0 | 0 | — | — | — | — | — | — | — |
| 1983 | 13–20 | 39.4% | — | 1,684 | 0 | 0 | — | — | — | — | — | — | — |
| 1984 | 9–18 | 33.3% | — | 1,600 | 0 | 0 | — | — | — | — | — | — | — |
| 1985 | 1–9 | 10.0% | — | 1,508 | 0 | 0 | — | — | — | — | — | — | — |
| 1986 | 0–1 | 0.0% | — | 1,500 | 0 | 0 | — | — | — | — | — | — | — |
| 1987 | 0–4 | 0.0% | — | 1,453 | 0 | 0 | — | — | — | — | — | — | — |
| 1988 | 3–5 | 37.5% | — | 1,491 | 0 | 0 | — | — | — | — | — | — | — |
| 1989 | 2–8 | 20.0% | — | 1,473 | 0 | 0 | — | — | — | — | — | — | — |
| 1990 | 1–9 | 10.0% | — | 1,421 | 0 | 0 | — | — | — | — | — | — | — |
| 1991 | 1–5 | 16.7% | — | 1,406 | 0 | 0 | — | — | — | — | — | — | — |
| 1992 | 1–2 | 33.3% | — | 1,413 | 0 | 0 | — | — | — | — | — | — | — |
| 1993 | 0–1 | 0.0% | — | 1,407 | 0 | 0 | — | — | — | — | — | — | — |
| 1994 | 0–2 | 0.0% | — | 1,393 | 0 | 0 | — | — | — | — | — | — | — |
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.
| Sandy Collins | K Allen | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 |
| 1973 | 1497 | 99.4 | — | — | — | — | — | — | — | 50.0% | 0.00 | — | — | — | +0.62 | 1978 | 1498 | 96.2 | — | — | — | — | — | — | — | 40.0% | -1.00 | 1–0 | — | — | +0.19 |
| 1978 | 1541 | 118.0 | — | — | — | — | +85 | — | — | 56.3% | +0.66 | 0–4 (0%) | — | — | +1.24 | 1979 | 1481 | 94.2 | — | — | — | — | — | — | — | 0.0% | -4.50 | — | — | — | +0.08 |
| 1979 | 1498 | 107.8 | — | — | — | — | — | -8 | — | 30.0% | -0.55 | 0–2 | 0–1 | — | +1.31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1980 | 1632 | 129.0 | — | — | — | — | +7 | — | — | 48.9% | +0.22 | 3–2 (60%) | 1–2 (33%) | 101.5 | -0.07 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1981 | 1787 | 138.1 | — | — | — | — | -48 | -82 | -188 | 52.6% | -0.04 | 6–3 (67%) | 5–4 (56%) | 104.5 | -1.55 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1982 | 1734 | 126.6 | — | — | — | — | -17 | -44 | — | 38.7% | -0.91 | 6–3 (67%) | 2–4 (33%) | 103.2 | -0.37 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1983 | 1685 | 124.3 | — | — | — | — | +34 | -29 | -111 | 40.8% | -0.63 | 2–3 (40%) | 1–5 (17%) | 95.5 | -0.09 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1984 | 1601 | 117.8 | — | — | — | — | +112 | -8 | -91 | 34.4% | -0.97 | 4–5 (44%) | 1–2 (33%) | 98.9 | -0.22 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1985 | 1508 | 99.3 | — | — | — | — | +102 | — | — | 18.2% | -2.36 | 0–2 | 1–0 | — | +0.69 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1986 | 1500 | 101.5 | — | — | — | — | — | — | — | 33.3% | -2.33 | 0–1 | — | — | -0.03 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1987 | 1454 | 94.2 | — | — | — | — | — | — | — | 11.1% | -2.56 | 0–1 | — | — | +0.23 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1988 | 1491 | 114.4 | — | — | — | — | +85 | — | — | 42.1% | -0.63 | 1–2 (33%) | 1–3 (25%) | 97.4 | -0.02 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1989 | 1473 | 103.5 | — | — | — | — | +56 | — | — | 23.8% | -1.71 | 0–1 | 2–0 | — | +0.43 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1990 | 1422 | 95.6 | — | — | — | — | +39 | +112 | — | 17.4% | -2.65 | 1–2 (33%) | — | — | +0.17 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1991 | 1406 | 104.6 | — | — | — | — | +39 | — | — | 21.4% | -2.00 | 1–1 | 0–1 | — | +0.16 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1992 | 1413 | 104.4 | — | — | — | — | — | — | — | 33.3% | -0.83 | — | 0–1 | — | +0.18 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1993 | 1408 | 95.8 | — | — | — | — | — | — | — | 0.0% | -5.00 | — | — | — | -0.07 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 1994 | 1394 | 103.0 | — | — | — | — | — | — | — | 33.3% | -1.33 | 0–2 | 1–1 | — | -0.05 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Career | 1825 | 126.0 | — | — | — | — | +28 | -36 | -128 | 39.2% | -0.75 | 24–34 (41%) | 15–24 (38%) | 92.7 | +1.07 | Career | 1514 | 95.2 | — | — | — | — | — | — | — | 28.6% | -2.00 | 1–0 | — | — | +9.00 |
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 |
|---|---|---|---|---|---|
| Barbara Potter | 1 | 7 | 8 | Aug 31, 1984 | H2H |
| Mareen Louie Harper | 2 | 4 | 6 | Feb 1, 1990 | H2H |
| Hana Mandlikova | 2 | 3 | 5 | Aug 18, 1983 | H2H |
| Dianne Fromholtz | 0 | 4 | 4 | Feb 6, 1985 | H2H |
| Chris Evert | 0 | 4 | 4 | Aug 23, 1984 | H2H |
| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Jean Nachand | 0 | 1 | 1 | Jul 12, 1979 | H2H |
| Sandy Collins | 0 | 1 | 1 | Jul 14, 1978 | H2H |
| Mary Otoole | 1 | 0 | 1 | Jul 13, 1978 | H2H |