H2H data updated: 2026-09-13 00:00 UTC

Janet Newberry vs Mary Lou Piatek H2H: 0-1

Mary Lou Piatek holds a 1–0 lead over Janet Newberry in their WTA head-to-head. Across 1 main-draw meeting, Mary Lou Piatek leads 1–0 on clay. Most recently, Mary Lou Piatek won the 1980 Indianapolis round of 32 6-1 6-2.

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Janet Newberry
USA Age 73 Right-Handed 170 cm / 5'7"
H2H
0 – 1
1 main-draw meetings
Mary Lou Piatek
USA

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Mary Lou Piatek 6-1 6-2 Janet Newberry Match data Aug 7, 1980* R32 Indianapolis WTA 250 Clay

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
Janet Newberry — — — 1,922 238 187 56.0% 0 0 0 1 7 8
Mary Lou Piatek — — — 1,931 153 206 42.6% 0 0 0 0 2 2

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.

Janet Newberry Mary Lou Piatek
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1968 7–5 58.3% — 1,542 0 0 1978 0–1 0.0% — 1,499 0 0
1969 13–6 68.4% — 1,631 0 2 1979 3–5 37.5% — 1,546 0 0
1970 20–7 74.1% — 1,718 0 5 1980 16–12 57.1% — 1,734 0 0
1971 15–9 62.5% — 1,757 0 5 1981 30–22 57.7% — 1,869 0 1
1972 20–17 54.1% — 1,707 0 5 1982 18–21 46.2% — 1,791 0 1
1973 32–24 57.1% — 1,851 0 5 1983 12–20 37.5% — 1,720 0 1
1974 22–22 50.0% — 1,812 0 5 1984 18–20 47.4% — 1,703 0 2
1975 31–22 58.5% — 1,903 0 6 1985 14–18 43.8% — 1,677 0 2
1976 14–10 58.3% — 1,862 0 6 1986 8–15 34.8% — 1,618 0 2
1977 25–22 53.2% — 1,875 0 7 1987 6–12 33.3% — 1,594 0 2
1978 15–14 51.7% — 1,831 0 7 1988 6–16 27.3% — 1,542 0 2
1979 12–21 36.4% — 1,680 0 7 1989 7–15 31.8% — 1,592 0 2
1980 12–8 60.0% — 1,643 0 8 1990 8–11 42.1% — 1,611 0 2
— — — — — — — 1991 5–8 38.5% — 1,629 0 2
— — — — — — — 1992 1–8 11.1% — 1,559 0 2
— — — — — — — 1993 1–2 33.3% — 1,554 0 2

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.

Janet Newberry Mary Lou Piatek
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 %
1968 7 5 12 58.3% — — — — — — — — — — — — 1978 — — — — — — — — — — — — 0 1 1 0.0%
1969 12 4 16 75.0% — — — — 1 2 3 33.3% — — — — 1979 1 1 2 50.0% 0 1 1 0.0% — — — — 2 3 5 40.0%
1970 15 3 18 83.3% 2 1 3 66.7% 3 3 6 50.0% — — — — 1980 5 3 8 62.5% 3 1 4 75.0% 0 2 2 0.0% 8 6 14 57.1%
1971 2 2 4 50.0% 1 1 2 50.0% 12 6 18 66.7% — — — — 1981 15 5 20 75.0% 6 4 10 60.0% 4 6 10 40.0% 5 7 12 41.7%
1972 6 4 10 60.0% 6 6 12 50.0% 6 6 12 50.0% — — — — 1982 4 5 9 44.4% 0 3 3 0.0% 1 2 3 33.3% 13 11 24 54.2%
1973 6 5 11 54.5% 10 5 15 66.7% 8 5 13 61.5% 8 9 17 47.1% 1983 5 6 11 45.5% 1 4 5 20.0% 0 2 2 0.0% 6 8 14 42.9%
1974 4 5 9 44.4% 1 4 5 20.0% 8 4 12 66.7% 9 9 18 50.0% 1984 9 8 17 52.9% 0 1 1 0.0% 5 6 11 45.5% 4 5 9 44.4%
1975 7 5 12 58.3% 20 9 29 69.0% 3 2 5 60.0% 1 6 7 14.3% 1985 7 11 18 38.9% 2 1 3 66.7% 1 2 3 33.3% 4 4 8 50.0%
1976 1 2 3 33.3% 9 4 13 69.2% 2 2 4 50.0% 2 2 4 50.0% 1986 5 5 10 50.0% 0 2 2 0.0% 1 2 3 33.3% 2 6 8 25.0%
1977 4 4 8 50.0% 13 7 20 65.0% 3 3 6 50.0% 5 8 13 38.5% 1987 3 5 8 37.5% 0 2 2 0.0% 0 2 2 0.0% 3 3 6 50.0%
1978 1 2 3 33.3% 7 5 12 58.3% 5 3 8 62.5% 2 4 6 33.3% 1988 4 9 13 30.8% 1 4 5 20.0% 0 1 1 0.0% 1 2 3 33.3%
1979 2 4 6 33.3% 2 5 7 28.6% 5 5 10 50.0% 1 5 6 16.7% 1989 7 9 16 43.8% 0 3 3 0.0% 0 2 2 0.0% 0 1 1 0.0%
1980 6 5 11 54.5% 1 1 2 50.0% 4 0 4 100.0% — — — — 1990 4 5 9 44.4% 3 3 6 50.0% 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%
— — — — — — — — — — — — — — — — — 1992 0 6 6 0.0% 1 1 2 50.0% 0 1 1 0.0% — — — —
— — — — — — — — — — — — — — — — — 1993 1 2 3 33.3% — — — — — — — — — — — —
Career 73 50 123 59.3% 72 48 120 60.0% 60 41 101 59.4% 28 43 71 39.4% Career 75 85 160 46.9% 17 32 49 34.7% 12 29 41 29.3% 49 60 109 45.0%

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.

Janet Newberry Mary Lou Piatek
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
1968 1542 104.3 — — — — +45 — — 55.6% +0.41 2–1 (67%) — — +0.69 1978 1499 106.8 — — — — — — — 0.0% -3.50 — — — -0.12
1969 1632 120.1 — — — — +106 — -86 67.4% +1.19 2–3 (40%) — — +1.11 1979 1547 118.2 — — — — +97 — — 42.1% -0.89 1–2 (33%) 0–1 — +0.14
1970 1719 128.8 — — — — +177 -163 -147 70.0% +1.70 4–4 (50%) 0–1 — +3.95 1980 1735 137.7 — — — — +8 -158 — 55.7% +0.51 3–2 (60%) 1–0 — -0.18
1971 1758 132.0 — — — — +111 — -30 56.9% +0.65 4–1 (80%) — — +0.89 1981 1869 146.1 — — — — +63 -192 -295 56.7% +0.48 8–10 (44%) 6–5 (55%) 101.1 -3.04
1972 1707 131.6 — — — — +164 -98 -1 54.3% +0.39 5–4 (56%) 0–2 — -0.95 1982 1792 141.6 — — — — +56 -194 -210 47.1% -0.08 4–5 (44%) 2–3 (40%) 96.7 -0.75
1973 1852 140.9 — — — — -29 -44 -119 55.8% +0.08 11–8 (58%) 7–1 (88%) 106.5 -4.59 1983 1721 143.7 — — — — +53 -86 — 41.3% -0.43 4–7 (36%) 0–5 (0%) 91.3 -3.81
1974 1813 140.5 — — — — -4 -63 -20 50.5% +0.13 4–5 (44%) 5–5 (50%) 99.4 -2.47 1984 1703 128.4 — — — — -13 — -69 47.7% -0.47 5–5 (50%) 4–3 (57%) 101.0 -0.69
1975 1904 152.7 — — — — -63 +15 -117 57.6% +0.47 6–6 (50%) 6–1 (86%) 104.5 -5.60 1985 1678 113.6 — — — — -29 -65 -67 43.1% -0.61 5–3 (63%) 1–3 (25%) 100.7 +2.10
1976 1863 123.7 — — — — -83 +57 -40 51.8% -0.23 7–1 (88%) 3–1 (75%) 107.1 -1.77 1986 1618 111.0 — — — — +10 — -24 38.5% -0.67 2–4 (33%) 0–3 (0%) 95.5 +1.60
1977 1875 146.0 — — — — -74 +55 -101 52.8% +0.28 6–6 (50%) 2–5 (29%) 95.9 -3.22 1987 1594 117.2 — — — — +33 — — 35.7% -0.78 3–3 (50%) 0–1 — +0.29
1978 1831 138.7 — — — — -69 +30 +11 50.7% +0.12 5–4 (56%) 0–4 (0%) 95.6 -2.30 1988 1542 116.2 — — — — +33 -43 — 30.8% -1.31 4–4 (50%) 0–2 — -0.55
1979 1681 129.3 — — — — +2 +125 +112 39.1% -0.90 2–3 (40%) 4–4 (50%) 97.3 +0.41 1989 1592 121.3 — — — — +35 -116 — 31.4% -1.65 5–2 (71%) 4–2 (67%) 107.3 -2.88
1980 1644 112.8 — — — — -10 — +207 60.0% +0.76 4–3 (57%) 1–1 — +2.97 1990 1611 125.3 — — — — +8 -85 — 43.9% -0.63 1–2 (33%) 0–2 — -0.44
— — — — — — — — — — — — — — — — 1991 1630 119.4 — — — — +17 — — 41.4% -0.31 1–2 (33%) 0–2 — -0.69
— — — — — — — — — — — — — — — — 1992 1560 101.4 — — — — -16 — — 23.8% -2.00 0–3 (0%) 0–2 — -0.39
— — — — — — — — — — — — — — — — 1993 1555 103.2 — — — — -22 — — 42.9% -0.71 0–1 1–0 — -0.16
Career 1922 142.9 — — — — +13 +8 -28 54.9% +0.32 62–49 (56%) 28–25 (53%) 101.7 -2.59 Career 1932 136.4 — — — — +26 -124 -154 43.9% -0.44 46–55 (46%) 19–34 (36%) 92.3 -2.67

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.