H2H data updated: 2026-09-14 00:00 UTC

Ann Kiyomura Hayashi vs Betty Ann Grubb H2H: 1-0

Ann Kiyomura Hayashi holds a 1–0 lead over Betty Ann Grubb in their WTA head-to-head. Across 1 main-draw meeting, Ann Kiyomura Hayashi leads 1–0 on carpet. Most recently, Ann Kiyomura Hayashi won the 1979 Detroit round of 32 4-6 6-2 6-4.

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Ann Kiyomura Hayashi
USA
H2H
1 – 0
1 main-draw meetings
Betty Ann Grubb
USA

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Ann Kiyomura Hayashi 4-6 6-2 6-4 Betty Ann Grubb Match data Feb 22, 1979* R32 Detroit WTA 250 Carpet

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
Ann Kiyomura Hayashi — — — 1,925 182 200 47.6% 0 0 0 0 2 2
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.

Ann Kiyomura Hayashi Betty Ann Grubb
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
1968 0–1 0.0% — 1,488 0 0 1968 21–8 72.4% — 1,633 0 2
1969 0–1 0.0% — 1,473 0 0 1969 29–14 67.4% — 1,777 0 4
1970 0–1 0.0% — 1,459 0 0 1970 18–15 54.5% — 1,684 0 4
1971 0–1 0.0% — 1,457 0 0 1971 5–11 31.2% — 1,679 0 4
1972 5–4 55.6% — 1,516 0 0 1972 2–2 50.0% — 1,673 0 5
1973 28–30 48.3% — 1,648 0 0 1973 4–4 50.0% — 1,699 0 6
1974 24–13 64.9% — 1,789 0 0 1974 7–10 41.2% — 1,675 0 6
1975 7–12 36.8% — 1,749 0 0 1975 5–4 55.6% — 1,728 0 6
1976 9–16 36.0% — 1,724 0 0 1976 2–4 33.3% — 1,683 0 6
1977 4–8 33.3% — 1,740 0 0 1977 0–2 0.0% — 1,652 0 6
1978 10–7 58.8% — 1,809 0 1 1978 3–1 75.0% — 1,660 0 6
1979 26–22 54.2% — 1,874 0 1 1979 25–26 49.0% — 1,816 0 6
1980 13–20 39.4% — 1,718 0 1 1980 2–9 18.2% — 1,721 0 6
1981 23–19 54.8% — 1,852 0 2 1981 1–2 33.3% — 1,709 0 6
1982 18–20 47.4% — 1,828 0 2 — — — — — — —
1983 13–20 39.4% — 1,716 0 2 — — — — — — —
1984 2–5 28.6% — 1,686 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.

Ann Kiyomura Hayashi 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 %
1968 0 1 1 0.0% — — — — — — — — — — — — 1968 9 2 11 81.8% 10 3 13 76.9% 2 3 5 40.0% — — — —
1969 0 1 1 0.0% — — — — — — — — — — — — 1969 10 3 13 76.9% — — — — 14 9 23 60.9% 2 2 4 50.0%
1970 0 1 1 0.0% — — — — — — — — — — — — 1970 6 3 9 66.7% 5 4 9 55.6% 5 6 11 45.5% 1 1 2 50.0%
1971 — — — — — — — — 0 1 1 0.0% — — — — 1971 2 3 5 40.0% 2 3 5 40.0% 1 2 3 33.3% 0 3 3 0.0%
1972 — — — — 1 1 2 50.0% 4 2 6 66.7% 0 1 1 0.0% 1972 0 2 2 0.0% — — — — — — — — — — — —
1973 4 5 9 44.4% 7 7 14 50.0% 11 11 22 50.0% 6 7 13 46.2% 1973 3 2 5 60.0% — — — — — — — — 1 2 3 33.3%
1974 5 2 7 71.4% 1 2 3 33.3% 14 7 21 66.7% 4 2 6 66.7% 1974 6 5 11 54.5% 1 2 3 33.3% — — — — 0 3 3 0.0%
1975 4 4 8 50.0% 0 1 1 0.0% 2 2 4 50.0% 0 4 4 0.0% 1975 5 3 8 62.5% — — — — — — — — 0 1 1 0.0%
1976 0 1 1 0.0% 2 2 4 50.0% 2 4 6 33.3% 5 9 14 35.7% 1976 2 3 5 40.0% 0 1 1 0.0% — — — — — — — —
1977 0 1 1 0.0% 0 1 1 0.0% 2 1 3 66.7% 2 5 7 28.6% 1977 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0%
1978 4 2 6 66.7% 4 0 4 100.0% 1 2 3 33.3% 1 3 4 25.0% 1979 8 9 17 47.1% 4 4 8 50.0% 9 6 15 60.0% 4 7 11 36.4%
1979 10 7 17 58.8% — — — — 1 2 3 33.3% 15 13 28 53.6% 1980 0 1 1 0.0% 0 1 1 0.0% 2 2 4 50.0% 0 5 5 0.0%
1980 7 7 14 50.0% — — — — 3 5 8 37.5% 3 8 11 27.3% 1981 1 2 3 33.3% — — — — — — — — — — — —
1981 2 4 6 33.3% 2 2 4 50.0% 9 6 15 60.0% 10 7 17 58.8% — — — — — — — — — — — — — — — — —
1982 6 5 11 54.5% 0 1 1 0.0% 7 6 13 53.8% 5 8 13 38.5% — — — — — — — — — — — — — — — — —
1983 5 5 10 50.0% — — — — 4 6 10 40.0% 4 9 13 30.8% — — — — — — — — — — — — — — — — —
1984 0 2 2 0.0% — — — — 2 2 4 50.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
Career 47 48 95 49.5% 17 17 34 50.0% 62 57 119 52.1% 55 77 132 41.7% 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.

Ann Kiyomura Hayashi 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
1968 1488 90.8 — — — — — — — 0.0% -6.00 — — — -0.08 1968 1633 121.5 — — — — +94 +16 -113 69.8% +1.56 3–2 (60%) — — 0.00
1969 1473 94.6 — — — — — — — 0.0% -4.50 — — — +0.08 1969 1777 129.3 — — — — +55 — -18 64.1% +0.96 5–3 (63%) — — +1.73
1970 1460 98.9 — — — — — — — 0.0% -2.00 — 0–1 — +0.19 1970 1685 118.2 — — — — +114 -50 +6 53.4% +0.34 4–3 (57%) 1–0 — +0.50
1971 1457 104.8 — — — — — — — 33.3% -0.67 0–1 — — -0.19 1971 1680 131.9 — — — — +54 -42 +16 25.0% -1.81 2–0 0–2 — -2.09
1972 1516 107.6 — — — — — — +85 47.6% +0.24 3–0 (100%) 0–1 — +1.18 1972 1673 104.5 — — — — — — — 50.0% 0.00 — — — -0.16
1973 1648 127.6 — — — — -75 -23 -24 50.0% -0.14 8–12 (40%) 4–4 (50%) 99.3 +4.25 1973 1700 124.2 — — — — +39 — — 47.1% -0.35 1–0 0–1 — +0.31
1974 1789 136.8 — — — — -106 -163 +40 59.5% +0.55 8–4 (67%) 2–1 (67%) 107.2 +0.93 1974 1676 118.4 — — — — -14 -33 — 47.2% +0.08 1–3 (25%) 0–5 (0%) 92.5 -0.32
1975 1750 124.3 — — — — -7 — +32 38.6% -1.16 3–5 (38%) 2–1 (67%) 100.1 -0.93 1975 1728 114.2 — — — — +19 — — 47.4% -0.31 2–1 (67%) 2–1 (67%) 101.9 +0.34
1976 1724 127.9 — — — — -53 -75 +49 41.1% -0.80 3–5 (38%) 1–1 — -0.96 1976 1684 105.1 — — — — +18 — — 33.3% -0.58 — 0–2 — +0.77
1977 1740 135.0 — — — — -68 — +42 37.0% -0.93 1–2 (33%) 0–1 — -1.45 1977 1653 100.1 — — — — — — — 20.0% -1.00 0–1 0–1 — +0.17
1978 1810 140.1 — — — — -59 -135 -22 56.8% +0.62 2–1 (67%) 1–2 (33%) 100.7 -0.22 1978 1660 112.4 — — — — — — — 75.0% +2.63 — — — +0.35
1979 1875 150.3 — — — — +16 — -129 53.6% +0.14 12–8 (60%) 5–4 (56%) 104.4 -0.58 1979 1817 140.6 — — — — -45 -172 -41 45.3% -0.42 12–5 (71%) 5–5 (50%) 106.5 -0.93
1980 1719 127.4 — — — — +24 — -38 46.7% -0.05 4–9 (31%) 2–4 (33%) 91.8 -0.63 1980 1722 127.1 — — — — -73 — +67 33.3% -1.07 2–5 (29%) 1–2 (33%) 95.6 -1.30
1981 1852 135.7 — — — — -26 -139 -64 53.7% +0.03 6–5 (55%) 3–2 (60%) 101.7 -0.47 1981 1709 110.6 — — — — -33 — — 33.3% -0.50 — 0–1 — -0.04
1982 1828 133.7 — — — — -41 — 0 43.0% -0.73 9–5 (64%) 6–1 (86%) 108.1 -4.10 — — — — — — — — — — — — — — — —
1983 1717 130.9 — — — — +25 — +29 42.0% -0.68 2–3 (40%) 6–3 (67%) 100.2 -1.71 — — — — — — — — — — — — — — — —
1984 1687 109.3 — — — — -20 — +88 26.7% -2.27 1–0 1–0 — -0.36 — — — — — — — — — — — — — — — —
Career 1926 140.1 — — — — -21 -76 +3 48.0% -0.26 62–60 (51%) 33–26 (56%) 104.8 -1.34 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.