H2H data updated: 2026-10-29 00:00 UTC

Billie Jean King vs Carol Baily H2H: 1-0

Billie Jean King holds a 1–0 lead over Carol Baily in their WTA head-to-head. Across 1 main-draw meeting, Billie Jean King leads 1–0 on hard courts. Most recently, Billie Jean King won the 1977 San Antonio round of 16 6-4 6-4.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Billie Jean King
USA Age 82 Right-Handed 164 cm / 5'5"
H2H
1 – 0
1 main-draw meetings
Carol Baily
USA Age 76

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Billie Jean King 6-4 6-4 Carol Baily Match data Mar 24, 1977* R16 San Antonio 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
Billie Jean King — #2 — 2,437 684 161 80.9% 8 0 0 4 56 68
Carol Baily — — — 1,521 11 26 29.7% 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.

Age Billie Jean King Carol Baily
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
22 — — — — — — — 1973 0–1 0.0% — 1,491 0 0
23 — — — — — — — 1974 2–7 22.2% — 1,417 0 0
24 1968 40–5 88.9% — 1,865 1 1 — — — — — — —
25 1969 58–14 80.6% — 2,056 1 6 — — — — — — —
26 1970 47–11 81.0% — 2,180 1 11 1977 5–8 38.5% — 1,451 0 0
27 1971 114–15 88.4% — 2,302 2 28 1978 0–2 0.0% — 1,429 0 0
28 1972 89–15 85.6% — 2,378 5 39 — — — — — — —
29 1973 56–12 82.4% — 2,349 6 46 1980 2–4 33.3% — 1,451 0 0
30 1974 54–8 87.1% — 2,326 7 52 1981 2–4 33.3% — 1,480 0 0
31 1975 23–4 85.2% #4 2,383 8 54 — — — — — — —
32 1976 2–2 50.0% — 2,329 8 54 — — — — — — —
33 1977 46–6 88.5% #2 2,398 8 60 — — — — — — —
34 1978 28–12 70.0% #5 2,339 8 60 — — — — — — —
35 1979 36–13 73.5% #5 2,187 8 62 — — — — — — —
36 1980 39–15 72.2% #6 2,153 8 65 — — — — — — —
37 1981 4–5 44.4% — 2,045 8 65 — — — — — — —
38 1982 26–19 57.8% — 1,942 8 66 — — — — — — —
39 1983 22–5 81.5% — 2,058 8 68 — — — — — — —

Surface Results by Age

Seasons are aligned by the age each player spent most of that calendar year. 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.

Age Billie Jean King Carol Baily
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 %
22 — — — — — — — — — — — — — — — — — 1973 0 1 1 0.0% — — — — — — — — — — — —
23 — — — — — — — — — — — — — — — — — 1974 0 2 2 0.0% 2 2 4 50.0% — — — — — — — —
24 1968 4 1 5 80.0% 4 1 5 80.0% 26 2 28 92.9% 6 1 7 85.7% — — — — — — — — — — — — — — — — —
25 1969 17 1 18 94.4% 9 5 14 64.3% 26 7 33 78.8% 6 1 7 85.7% — — — — — — — — — — — — — — — — —
26 1970 13 2 15 86.7% 18 5 23 78.3% 8 1 9 88.9% 8 3 11 72.7% 1977 1 1 2 50.0% 0 1 1 0.0% 2 2 4 50.0% 2 2 4 50.0%
27 1971 16 3 19 84.2% 29 5 34 85.3% 28 5 33 84.8% 41 2 43 95.3% 1978 — — — — 0 1 1 0.0% — — — — 0 1 1 0.0%
28 1972 20 3 23 87.0% 32 6 38 84.2% 22 1 23 95.7% 15 5 20 75.0% — — — — — — — — — — — — — — — — —
29 1973 14 3 17 82.4% 8 3 11 72.7% 12 1 13 92.3% 22 5 27 81.5% 1980 2 1 3 66.7% — — — — — — — — 0 3 3 0.0%
30 1974 12 3 15 80.0% 4 1 5 80.0% 9 1 10 90.0% 29 3 32 90.6% 1981 0 1 1 0.0% — — — — 2 2 4 50.0% 0 1 1 0.0%
31 1975 7 3 10 70.0% — — — — 11 1 12 91.7% 5 0 5 100.0% — — — — — — — — — — — — — — — — —
32 1976 2 2 4 50.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
33 1977 20 0 20 100.0% 8 3 11 72.7% 6 2 8 75.0% 12 1 13 92.3% — — — — — — — — — — — — — — — — —
34 1978 4 2 6 66.7% — — — — 8 2 10 80.0% 16 8 24 66.7% — — — — — — — — — — — — — — — — —
35 1979 17 3 20 85.0% — — — — 12 5 17 70.6% 7 5 12 58.3% — — — — — — — — — — — — — — — — —
36 1980 5 1 6 83.3% 3 2 5 60.0% 3 1 4 75.0% 28 11 39 71.8% — — — — — — — — — — — — — — — — —
37 1981 — — — — 0 1 1 0.0% 0 1 1 0.0% 4 3 7 57.1% — — — — — — — — — — — — — — — — —
38 1982 0 2 2 0.0% 4 4 8 50.0% 13 4 17 76.5% 9 9 18 50.0% — — — — — — — — — — — — — — — — —
39 1983 — — — — 1 1 2 50.0% 16 2 18 88.9% 5 2 7 71.4% — — — — — — — — — — — — — — — — —
Career — 151 29 180 83.9% 120 37 157 76.4% 200 36 236 84.7% 213 59 272 78.3% — 3 6 9 33.3% 2 4 6 33.3% 4 4 8 50.0% 2 7 9 22.2%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. 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.

Age Billie Jean King Carol Baily
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
22 — — — — — — — — — — — — — — — — 1973 1492 101.3 — — — — — — — 0.0% -2.00 — — — -0.01
23 — — — — — — — — — — — — — — — — 1974 1417 86.8 — — — — — +99 — 28.6% -1.76 1–2 (33%) 2–1 (67%) 99.6 +0.76
24 1968 1865 141.1 — — — — -83 -273 +141 87.2% +2.72 6–2 (75%) — — +1.76 — — — — — — — — — — — — — — — —
25 1969 2056 154.1 — — — — +176 -365 +42 75.5% +2.11 12–5 (71%) — — -3.94 — — — — — — — — — — — — — — — —
26 1970 2181 166.1 — — — — +139 -229 +41 75.0% +2.11 11–5 (69%) 0–1 — -9.32 1977 1452 109.5 — — — — +114 — +95 41.9% -0.48 2–3 (40%) 2–3 (40%) 96.9 +0.93
27 1971 2303 170.6 — — — — +240 -117 +9 84.6% +2.55 20–4 (83%) 16–4 (80%) 116.1 -6.69 1978 1429 95.8 — — — — — — — 20.0% -2.00 0–1 — — +0.33
28 1972 2378 173.1 — — — — +144 -67 +84 82.1% +2.37 13–3 (81%) 8–7 (53%) 102.1 -8.73 — — — — — — — — — — — — — — — —
29 1973 2349 168.6 — — — — +152 -82 +159 82.7% +2.42 8–5 (62%) 9–5 (64%) 100.8 -4.73 1980 1451 108.4 — — — — +57 — — 46.2% -0.16 1–2 (33%) — — +0.13
30 1974 2327 171.4 — — — — +153 -73 +195 81.8% +2.54 10–2 (83%) 3–2 (60%) 104.2 -4.13 1981 1480 100.7 — — — — — — +115 35.7% -1.21 1–1 — — -0.23
31 1975 2383 170.4 — — — — +23 — +118 83.1% +2.53 2–3 (40%) 2–1 (67%) — -3.54 — — — — — — — — — — — — — — — —
32 1976 2330 114.1 — — — — +56 — — 50.0% -0.13 — 1–0 — -0.17 — — — — — — — — — — — — — — — —
33 1977 2398 165.2 — — — — +131 -139 +131 76.9% +1.69 16–1 (94%) 5–0 (100%) 111.5 -4.00 — — — — — — — — — — — — — — — —
34 1978 2340 168.0 — — — — +43 — +158 73.7% +1.86 2–6 (25%) 3–1 (75%) 93.1 -4.27 — — — — — — — — — — — — — — — —
35 1979 2187 156.8 — — — — +73 — +137 71.4% +1.51 8–8 (50%) 9–4 (69%) 94.9 -3.15 — — — — — — — — — — — — — — — —
36 1980 2154 165.7 — — — — +100 +123 +193 69.4% +1.09 9–6 (60%) 11–4 (73%) 100.8 -3.61 — — — — — — — — — — — — — — — —
37 1981 2045 121.5 — — — — +104 — — 44.4% -0.67 — — — -0.22 — — — — — — — — — — — — — — — —
38 1982 1943 150.6 — — — — -7 +197 +304 56.2% +0.42 12–7 (63%) 7–5 (58%) 98.0 -1.82 — — — — — — — — — — — — — — — —
39 1983 2059 156.0 — — — — -44 — +231 79.3% +1.93 2–2 (50%) 0–2 — -1.19 — — — — — — — — — — — — — — — —
Career — 2437 170.6 — — — — +122 -123 +121 77.4% +2.02 131–59 (69%) 74–36 (67%) 111.0 -6.97 — 1522 101.2 — — — — +86 +99 +105 36.0% -0.99 5–9 (36%) 4–4 (50%) 95.9 +5.16

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.