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

Mary Hamm vs Betty Ann Grubb H2H: 0-1

Betty Ann Grubb holds a 1–0 lead over Mary Hamm in their WTA head-to-head. Across 1 main-draw meeting, Betty Ann Grubb leads 1–0 on hard courts. Most recently, Betty Ann Grubb won the 1976 Kona round of 32 6-3 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.

Mary Hamm
USA
H2H
0 – 1
1 main-draw meetings
Betty Ann Grubb
USA

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Betty Ann Grubb 6-3 6-1 Mary Hamm Match data Dec 16, 1976* R32 Kona WTA 250 Hard

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 Hamm — — — 1,680 31 42 42.5% 0 0 0 0 0 0
Betty Ann Grubb — — — 1,824 124 112 52.5% 0 0 0 0 6 6

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 Hamm Betty Ann Grubb
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1969 0–1 0.0% — 1,491 0 0 1968 21–8 72.4% — 1,633 0 2
1973 1–4 20.0% — 1,471 0 0 1969 29–14 67.4% — 1,777 0 4
1974 4–3 57.1% — 1,515 0 0 1970 18–15 54.5% — 1,684 0 4
1975 4–3 57.1% — 1,539 0 0 1971 5–11 31.2% — 1,679 0 4
1976 6–6 50.0% — 1,584 0 0 1972 2–2 50.0% — 1,673 0 5
1977 12–18 40.0% — 1,661 0 0 1973 4–4 50.0% — 1,699 0 6
1978 1–4 20.0% — 1,631 0 0 1974 7–10 41.2% — 1,675 0 6
1981 3–3 50.0% — 1,604 0 0 1975 5–4 55.6% — 1,728 0 6
— — — — — — — 1976 2–4 33.3% — 1,683 0 6
— — — — — — — 1977 0–2 0.0% — 1,652 0 6
— — — — — — — 1978 3–1 75.0% — 1,660 0 6
— — — — — — — 1979 25–26 49.0% — 1,816 0 6
— — — — — — — 1980 2–9 18.2% — 1,721 0 6
— — — — — — — 1981 1–2 33.3% — 1,709 0 6

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 Hamm Betty Ann Grubb
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 %
1969 — — — — 0 1 1 0.0% — — — — — — — — 1968 9 2 11 81.8% 10 3 13 76.9% 2 3 5 40.0% — — — —
1973 0 2 2 0.0% — — — — 0 1 1 0.0% — — — — 1969 10 3 13 76.9% — — — — 14 9 23 60.9% 2 2 4 50.0%
1974 — — — — 2 2 4 50.0% 2 1 3 66.7% — — — — 1970 6 3 9 66.7% 5 4 9 55.6% 5 6 11 45.5% 1 1 2 50.0%
1975 — — — — — — — — 1 1 2 50.0% — — — — 1971 2 3 5 40.0% 2 3 5 40.0% 1 2 3 33.3% 0 3 3 0.0%
1976 3 3 6 50.0% 2 2 4 50.0% — — — — 1 1 2 50.0% 1972 0 2 2 0.0% — — — — — — — — — — — —
1977 4 3 7 57.1% 4 6 10 40.0% 0 2 2 0.0% 3 5 8 37.5% 1973 3 2 5 60.0% — — — — — — — — 1 2 3 33.3%
1978 1 1 2 50.0% — — — — — — — — 0 3 3 0.0% 1974 6 5 11 54.5% 1 2 3 33.3% — — — — 0 3 3 0.0%
— — — — — — — — — — — — — — — — — 1975 5 3 8 62.5% — — — — — — — — 0 1 1 0.0%
— — — — — — — — — — — — — — — — — 1976 2 3 5 40.0% 0 1 1 0.0% — — — — — — — —
— — — — — — — — — — — — — — — — — 1977 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0%
— — — — — — — — — — — — — — — — — 1979 8 9 17 47.1% 4 4 8 50.0% 9 6 15 60.0% 4 7 11 36.4%
— — — — — — — — — — — — — — — — — 1980 0 1 1 0.0% 0 1 1 0.0% 2 2 4 50.0% 0 5 5 0.0%
— — — — — — — — — — — — — — — — — 1981 1 2 3 33.3% — — — — — — — — — — — —
Career 8 9 17 47.1% 8 11 19 42.1% 3 5 8 37.5% 4 9 13 30.8% Career 52 38 90 57.8% 22 19 41 53.7% 33 28 61 54.1% 8 25 33 24.2%

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 Hamm Betty Ann Grubb
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
1969 1492 97.2 — — — — — — — 0.0% -3.50 — — — -0.08 1968 1633 121.5 — — — — +94 +16 -113 69.8% +1.56 3–2 (60%) — — 0.00
1973 1472 97.7 — — — — — — — 30.8% -1.08 1–2 (33%) 0–1 — +0.01 1969 1777 129.3 — — — — +55 — -18 64.1% +0.96 5–3 (63%) — — +1.73
1974 1516 103.8 — — — — — -6 +43 50.0% -0.06 3–1 (75%) 2–0 — +0.80 1970 1685 118.2 — — — — +114 -50 +6 53.4% +0.34 4–3 (57%) 1–0 — +0.50
1975 1540 117.4 — — — — — — — 62.5% +1.31 0–2 1–2 (33%) — +0.55 1971 1680 131.9 — — — — +54 -42 +16 25.0% -1.81 2–0 0–2 — -2.09
1976 1585 112.8 — — — — +22 -30 — 44.8% -0.31 4–1 (80%) 2–0 — +1.02 1972 1673 104.5 — — — — — — — 50.0% 0.00 — — — -0.16
1977 1661 131.0 — — — — +18 -54 — 42.0% -0.54 6–5 (55%) 3–2 (60%) 103.8 -0.77 1973 1700 124.2 — — — — +39 — — 47.1% -0.35 1–0 0–1 — +0.31
1978 1631 115.5 — — — — +18 — — 27.3% -1.27 0–1 0–2 — +0.46 1974 1676 118.4 — — — — -14 -33 — 47.2% +0.08 1–3 (25%) 0–5 (0%) 92.5 -0.32
1981 1604 108.7 — — — — — — — 50.0% +0.57 1–1 1–2 (33%) — +0.05 1975 1728 114.2 — — — — +19 — — 47.4% -0.31 2–1 (67%) 2–1 (67%) 101.9 +0.34
— — — — — — — — — — — — — — — — 1976 1684 105.1 — — — — +18 — — 33.3% -0.58 — 0–2 — +0.77
— — — — — — — — — — — — — — — — 1977 1653 100.1 — — — — — — — 20.0% -1.00 0–1 0–1 — +0.17
— — — — — — — — — — — — — — — — 1978 1660 112.4 — — — — — — — 75.0% +2.63 — — — +0.35
— — — — — — — — — — — — — — — — 1979 1817 140.6 — — — — -45 -172 -41 45.3% -0.42 12–5 (71%) 5–5 (50%) 106.5 -0.93
— — — — — — — — — — — — — — — — 1980 1722 127.1 — — — — -73 — +67 33.3% -1.07 2–5 (29%) 1–2 (33%) 95.6 -1.30
— — — — — — — — — — — — — — — — 1981 1709 110.6 — — — — -33 — — 33.3% -0.50 — 0–1 — -0.04
Career 1680 123.5 — — — — +19 -38 +43 43.6% -0.31 15–13 (54%) 9–9 (50%) 103.1 +2.79 Career 1825 133.9 — — — — +19 -51 -20 51.1% +0.14 32–23 (58%) 9–20 (31%) 97.8 -0.29

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.