H2H data updated: 2026-10-28 00:00 UTC

Mary Lou Piatek vs Sandy Collins H2H: 2-0

Mary Lou Piatek holds a 2–0 lead over Sandy Collins in their WTA head-to-head. Across 2 main-draw meetings, Mary Lou Piatek leads 1–0 on grass and 1–0 on hard courts. Most recently, Mary Lou Piatek won the 1990 Scottsdale round of 32 6-1 6-2.

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Mary Lou Piatek
USA
H2H
2 – 0
2 main-draw meetings
Sandy Collins
USA Age 68

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mary Lou Piatek 6-1 6-2 Sandy Collins Match data Oct 18, 1990* R32 Scottsdale Tier IV → modern equivalent WTA 250 Hard
Mary Lou Piatek 6-4 6-3 Sandy Collins Match data Jun 12, 1985* R64 Birmingham 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
Mary Lou Piatek — — — 1,938 157 207 43.1% 0 0 0 0 2 2
Sandy Collins — — — 1,824 90 152 37.2% 0 0 0 0 0 0

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.

Mary Lou Piatek Sandy Collins
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1978 0–1 0.0% — 1,499 0 0 1973 1–1 50.0% — 1,497 0 0
1979 3–5 37.5% — 1,547 0 0 1978 7–7 50.0% — 1,541 0 0
1980 20–13 60.6% — 1,762 0 0 1979 2–7 22.2% — 1,498 0 0
1981 30–22 57.7% — 1,874 0 1 1980 10–12 45.5% — 1,632 0 0
1982 18–21 46.2% — 1,793 0 1 1981 25–20 55.6% — 1,787 0 0
1983 12–20 37.5% — 1,721 0 1 1982 14–21 40.0% — 1,734 0 0
1984 18–20 47.4% — 1,704 0 2 1983 13–20 39.4% — 1,684 0 0
1985 14–18 43.8% — 1,678 0 2 1984 9–18 33.3% — 1,600 0 0
1986 8–15 34.8% — 1,618 0 2 1985 1–9 10.0% — 1,508 0 0
1987 6–12 33.3% — 1,594 0 2 1986 0–1 0.0% — 1,500 0 0
1988 6–16 27.3% — 1,542 0 2 1987 0–4 0.0% — 1,453 0 0
1989 7–15 31.8% — 1,592 0 2 1988 3–5 37.5% — 1,491 0 0
1990 8–11 42.1% — 1,611 0 2 1989 2–8 20.0% — 1,473 0 0
1991 5–8 38.5% — 1,629 0 2 1990 1–9 10.0% — 1,421 0 0
1992 1–8 11.1% — 1,560 0 2 1991 1–5 16.7% — 1,406 0 0
1993 1–2 33.3% — 1,554 0 2 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

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.

Mary Lou Piatek Sandy Collins
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 %
1978 — — — — — — — — — — — — 0 1 1 0.0% 1973 1 1 2 50.0% — — — — — — — — — — — —
1979 1 1 2 50.0% 0 1 1 0.0% — — — — 2 3 5 40.0% 1978 3 3 6 50.0% 0 1 1 0.0% 0 1 1 0.0% — — — —
1980 5 3 8 62.5% 3 1 4 75.0% 0 2 2 0.0% 12 7 19 63.2% 1979 0 1 1 0.0% 1 4 5 20.0% 1 1 2 50.0% 0 1 1 0.0%
1981 15 5 20 75.0% 6 4 10 60.0% 4 6 10 40.0% 5 7 12 41.7% 1980 4 6 10 40.0% 1 1 2 50.0% 0 1 1 0.0% 5 4 9 55.6%
1982 4 5 9 44.4% 0 3 3 0.0% 1 2 3 33.3% 13 11 24 54.2% 1981 4 5 9 44.4% 11 6 17 64.7% 3 2 5 60.0% 7 7 14 50.0%
1983 5 6 11 45.5% 1 4 5 20.0% 0 2 2 0.0% 6 8 14 42.9% 1982 3 2 5 60.0% 4 5 9 44.4% 0 2 2 0.0% 7 12 19 36.8%
1984 9 8 17 52.9% 0 1 1 0.0% 5 6 11 45.5% 4 5 9 44.4% 1983 5 6 11 45.5% 2 6 8 25.0% 2 3 5 40.0% 4 5 9 44.4%
1985 7 11 18 38.9% 2 1 3 66.7% 1 2 3 33.3% 4 4 8 50.0% 1984 7 6 13 53.8% 0 3 3 0.0% 0 6 6 0.0% 2 3 5 40.0%
1986 5 5 10 50.0% 0 2 2 0.0% 1 2 3 33.3% 2 6 8 25.0% 1985 1 5 6 16.7% 0 1 1 0.0% 0 2 2 0.0% 0 1 1 0.0%
1987 3 5 8 37.5% 0 2 2 0.0% 0 2 2 0.0% 3 3 6 50.0% 1986 — — — — — — — — 0 1 1 0.0% — — — —
1988 4 9 13 30.8% 1 4 5 20.0% 0 1 1 0.0% 1 2 3 33.3% 1987 0 2 2 0.0% — — — — 0 2 2 0.0% — — — —
1989 7 9 16 43.8% 0 3 3 0.0% 0 2 2 0.0% 0 1 1 0.0% 1988 3 4 7 42.9% — — — — 0 1 1 0.0% — — — —
1990 4 5 9 44.4% 3 3 6 50.0% 0 1 1 0.0% 1 2 3 33.3% 1989 1 5 6 16.7% — — — — 0 1 1 0.0% 1 2 3 33.3%
1991 5 5 10 50.0% 0 2 2 0.0% — — — — 0 1 1 0.0% 1990 0 5 5 0.0% 1 3 4 25.0% — — — — 0 1 1 0.0%
1992 0 6 6 0.0% 1 1 2 50.0% 0 1 1 0.0% — — — — 1991 1 2 3 33.3% 0 1 1 0.0% 0 1 1 0.0% 0 1 1 0.0%
1993 1 2 3 33.3% — — — — — — — — — — — — 1992 1 1 2 50.0% 0 1 1 0.0% — — — — — — — —
— — — — — — — — — — — — — — — — — 1993 — — — — — — — — — — — — 0 1 1 0.0%
— — — — — — — — — — — — — — — — — 1994 0 2 2 0.0% — — — — — — — — — — — —
Career 75 85 160 46.9% 17 32 49 34.7% 12 29 41 29.3% 53 61 114 46.5% Career 34 56 90 37.8% 20 32 52 38.5% 6 24 30 20.0% 26 38 64 40.6%

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.

Mary Lou Piatek Sandy Collins
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
1978 1499 106.9 — — — — — — — 0.0% -3.50 — — — -0.11 1973 1497 99.4 — — — — — — — 50.0% 0.00 — — — +0.62
1979 1547 118.3 — — — — +98 — — 42.1% -0.89 1–2 (33%) 0–1 — +0.12 1978 1541 118.0 — — — — +85 — — 56.3% +0.66 0–4 (0%) — — +1.24
1980 1763 137.4 — — — — +9 -186 — 57.7% +0.61 4–3 (57%) 3–0 (100%) — +0.65 1979 1498 107.8 — — — — — -8 — 30.0% -0.55 0–2 0–1 — +1.31
1981 1875 146.3 — — — — +65 -198 -301 56.7% +0.48 8–10 (44%) 6–5 (55%) 100.9 -2.75 1980 1632 129.0 — — — — +7 — — 48.9% +0.22 3–2 (60%) 1–2 (33%) 101.5 -0.07
1982 1794 142.2 — — — — +59 -196 -212 47.1% -0.08 4–5 (44%) 2–3 (40%) 96.6 -0.89 1981 1787 138.1 — — — — -48 -82 -188 52.6% -0.04 6–3 (67%) 5–4 (56%) 104.5 -1.55
1983 1722 143.9 — — — — +55 -87 — 41.3% -0.43 4–7 (36%) 0–5 (0%) 91.3 -4.11 1982 1734 126.6 — — — — -17 -44 — 38.7% -0.91 6–3 (67%) 2–4 (33%) 103.2 -0.37
1984 1704 128.6 — — — — -14 — -70 47.7% -0.47 5–5 (50%) 4–3 (57%) 100.9 -0.88 1983 1685 124.3 — — — — +34 -29 -111 40.8% -0.63 2–3 (40%) 1–5 (17%) 95.5 -0.09
1985 1678 113.9 — — — — -28 -65 -67 43.1% -0.61 5–3 (63%) 1–3 (25%) 100.7 +1.98 1984 1601 117.8 — — — — +112 -8 -91 34.4% -0.97 4–5 (44%) 1–2 (33%) 98.9 -0.22
1986 1619 111.1 — — — — +10 — -25 38.5% -0.67 2–4 (33%) 0–3 (0%) 95.5 +1.45 1985 1508 99.3 — — — — +102 — — 18.2% -2.36 0–2 1–0 — +0.69
1987 1595 117.3 — — — — +33 — — 35.7% -0.78 3–3 (50%) 0–1 — +0.12 1986 1500 101.5 — — — — — — — 33.3% -2.33 0–1 — — -0.03
1988 1543 116.2 — — — — +33 -44 — 30.8% -1.31 4–4 (50%) 0–2 — -0.58 1987 1454 94.2 — — — — — — — 11.1% -2.56 0–1 — — +0.23
1989 1593 121.4 — — — — +35 -117 — 31.4% -1.65 5–2 (71%) 4–2 (67%) 107.3 -2.73 1988 1491 114.4 — — — — +85 — — 42.1% -0.63 1–2 (33%) 1–3 (25%) 97.4 -0.02
1990 1612 125.3 — — — — +7 -86 — 43.9% -0.63 1–2 (33%) 0–2 — -0.44 1989 1473 103.5 — — — — +56 — — 23.8% -1.71 0–1 2–0 — +0.43
1991 1630 119.5 — — — — +17 — — 41.4% -0.31 1–2 (33%) 0–2 — -0.69 1990 1422 95.6 — — — — +39 +112 — 17.4% -2.65 1–2 (33%) — — +0.17
1992 1560 101.4 — — — — -16 — — 23.8% -2.00 0–3 (0%) 0–2 — -0.39 1991 1406 104.6 — — — — +39 — — 21.4% -2.00 1–1 0–1 — +0.16
1993 1555 103.2 — — — — -21 — — 42.9% -0.71 0–1 1–0 — -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 1938 136.6 — — — — +26 -129 -156 44.3% -0.42 47–56 (46%) 21–34 (38%) 92.7 -2.59 Career 1825 126.0 — — — — +28 -36 -128 39.2% -0.75 24–34 (41%) 15–24 (38%) 92.7 +1.07

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.