H2H data updated: 2026-09-12 00:00 UTC

Billie Jean King vs Mona Guerrant H2H: 3-0

Billie Jean King holds a 3–0 lead over Mona Guerrant in their WTA head-to-head. Across 3 main-draw meetings, Billie Jean King leads 1–0 on clay and 1–0 on grass. Most recently, Billie Jean King won the 1978 Eastbourne Open round of 64 7-6 6-1.

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Billie Jean King
USA Age 82 Right-Handed 164 cm / 5'5"
H2H
3 – 0
3 main-draw meetings
Mona Guerrant
USA Age 77 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Billie Jean King 7-6 6-1 Mona Guerrant Match data Jun 21, 1978* R64 Eastbourne Open WTA 250 Grass
Billie Jean King 6-1 6-4 Mona Guerrant Match data Oct 1, 1972* R16 Phoenix WTA 250 Hard
Billie Jean King 6-2 6-7(2) 6-1 Mona Guerrant Match data Sep 17, 1972* QF Charlotte 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
Billie Jean King #22 #2 — 2,437 684 160 81.0% 8 0 0 3 57 68
Mona Guerrant — — — 1,941 122 116 51.3% 0 0 0 0 3 3

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 Mona Guerrant
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
20 — — — — — — — 1969 1–1 50.0% — 1,500 0 0
21 — — — — — — — 1970 1–2 33.3% — 1,504 0 0
22 — — — — — — — 1971 3–8 27.3% — 1,517 0 0
23 — — — — — — — 1972 28–22 56.0% — 1,733 0 1
24 1968 40–5 88.9% — 1,865 1 1 1973 17–19 47.2% — 1,780 0 2
25 1969 58–14 80.6% — 2,056 1 6 1974 12–14 46.2% — 1,779 0 2
26 1970 47–11 81.0% — 2,180 1 11 1975 12–12 50.0% — 1,905 0 2
27 1971 114–15 88.4% — 2,302 2 28 1976 15–14 51.7% — 1,898 0 2
28 1972 89–15 85.6% — 2,378 5 39 1977 14–9 60.9% — 1,890 0 2
29 1973 56–12 82.4% — 2,349 6 46 1978 5–11 31.2% — 1,808 0 2
30 1974 54–8 87.1% — 2,326 7 52 — — — — — — —
31 1975 23–3 88.5% #4 2,391 8 54 1980 14–4 77.8% — 1,812 0 3
32 1976 2–2 50.0% — 2,336 8 54 — — — — — — —
33 1977 46–6 88.5% #2 2,398 8 60 — — — — — — —
34 1978 28–12 70.0% #5 2,336 8 60 — — — — — — —
35 1979 36–13 73.5% #5 2,185 8 62 — — — — — — —
36 1980 39–15 72.2% #6 2,151 8 65 — — — — — — —
37 1981 4–5 44.4% — 2,043 8 65 — — — — — — —
38 1982 26–19 57.8% — 1,941 8 66 — — — — — — —
39 1983 22–5 81.5% — 2,057 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 Mona Guerrant
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 %
20 — — — — — — — — — — — — — — — — — 1969 — — — — 1 1 2 50.0% — — — — — — — —
21 — — — — — — — — — — — — — — — — — 1970 — — — — 1 2 3 33.3% — — — — — — — —
22 — — — — — — — — — — — — — — — — — 1971 0 2 2 0.0% 2 2 4 50.0% 1 4 5 20.0% — — — —
23 — — — — — — — — — — — — — — — — — 1972 4 3 7 57.1% 9 8 17 52.9% 14 9 23 60.9% 1 1 2 50.0%
24 1968 4 1 5 80.0% 4 1 5 80.0% 26 2 28 92.9% 6 1 7 85.7% 1973 3 4 7 42.9% 7 7 14 50.0% 2 4 6 33.3% 5 4 9 55.6%
25 1969 17 1 18 94.4% 9 5 14 64.3% 26 7 33 78.8% 6 1 7 85.7% 1974 1 2 3 33.3% 0 3 3 0.0% 5 5 10 50.0% 6 4 10 60.0%
26 1970 13 2 15 86.7% 18 5 23 78.3% 8 1 9 88.9% 8 3 11 72.7% 1975 4 4 8 50.0% 3 2 5 60.0% 1 1 2 50.0% 4 5 9 44.4%
27 1971 16 3 19 84.2% 29 5 34 85.3% 28 5 33 84.8% 41 2 43 95.3% 1976 2 3 5 40.0% 0 1 1 0.0% 5 2 7 71.4% 8 8 16 50.0%
28 1972 20 3 23 87.0% 32 6 38 84.2% 22 1 23 95.7% 15 5 20 75.0% 1977 2 2 4 50.0% 6 3 9 66.7% 4 2 6 66.7% 2 2 4 50.0%
29 1973 14 3 17 82.4% 8 3 11 72.7% 12 1 13 92.3% 22 5 27 81.5% 1978 — — — — 2 2 4 50.0% 0 2 2 0.0% 3 7 10 30.0%
30 1974 12 3 15 80.0% 4 1 5 80.0% 9 1 10 90.0% 29 3 32 90.6% — — — — — — — — — — — — — — — — —
31 1975 7 2 9 77.8% — — — — 11 1 12 91.7% 5 0 5 100.0% 1980 0 1 1 0.0% — — — — — — — — 2 1 3 66.7%
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 28 179 84.4% 120 37 157 76.4% 200 36 236 84.7% 213 59 272 78.3% — 16 21 37 43.2% 31 31 62 50.0% 32 29 61 52.5% 31 32 63 49.2%

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 Mona Guerrant
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
20 — — — — — — — — — — — — — — — — 1969 1500 92.5 — — — — — — — 40.0% -2.40 1–0 — — +0.28
21 — — — — — — — — — — — — — — — — 1970 1504 106.4 — — — — — +14 — 42.9% -1.00 0–1 — — +0.10
22 — — — — — — — — — — — — — — — — 1971 1517 118.6 — — — — — +38 +14 35.7% -0.75 2–4 (33%) 0–3 (0%) 95.8 0.00
23 — — — — — — — — — — — — — — — — 1972 1734 136.4 — — — — -121 -79 -58 56.3% +0.56 8–11 (42%) 5–0 (100%) 103.8 +0.32
24 1968 1865 141.1 — — — — -83 -273 +141 87.2% +2.72 6–2 (75%) — — +1.76 1973 1781 144.7 — — — — -54 -77 -115 48.8% -0.15 3–5 (38%) 2–2 (50%) 99.8 -3.77
25 1969 2056 154.1 — — — — +176 -365 +42 75.5% +2.11 12–5 (71%) — — -3.94 1974 1779 137.0 — — — — -26 -97 -75 50.9% +0.11 1–4 (20%) 3–4 (43%) 97.1 -1.56
26 1970 2181 166.1 — — — — +139 -229 +41 75.0% +2.11 11–5 (69%) 0–1 — -9.32 1975 1906 154.1 — — — — -52 -116 — 48.2% -0.13 5–3 (63%) 2–4 (33%) 103.0 -3.85
27 1971 2303 170.6 — — — — +240 -117 +9 84.6% +2.55 20–4 (83%) 16–4 (80%) 116.1 -6.69 1976 1898 149.2 — — — — -30 — -110 55.9% +0.57 2–8 (20%) 2–5 (29%) 93.6 -2.51
28 1972 2378 173.1 — — — — +144 -67 +84 82.1% +2.37 13–3 (81%) 8–7 (53%) 102.1 -8.73 1977 1890 136.0 — — — — -64 -47 -93 57.7% +0.69 4–4 (50%) 3–1 (75%) 100.8 -0.54
29 1973 2349 168.6 — — — — +152 -82 +159 82.7% +2.42 8–5 (62%) 9–5 (64%) 100.8 -4.79 1978 1809 135.5 — — — — -44 -17 — 35.9% -0.87 3–4 (43%) 0–3 (0%) — -2.29
30 1974 2327 171.4 — — — — +153 -73 +194 81.8% +2.54 10–2 (83%) 3–2 (60%) 104.2 -3.91 — — — — — — — — — — — — — — — —
31 1975 2391 169.1 — — — — +33 — +109 85.7% +2.70 2–2 (50%) 2–0 — -2.95 1980 1812 138.2 — — — — -108 — — 73.8% +2.26 4–2 (67%) 1–0 — +0.36
32 1976 2337 113.7 — — — — +67 — — 50.0% -0.13 — 1–0 — -0.15 — — — — — — — — — — — — — — — —
33 1977 2398 164.8 — — — — +140 -140 +131 76.9% +1.69 16–1 (94%) 5–0 (100%) 111.3 -3.92 — — — — — — — — — — — — — — — —
34 1978 2337 167.5 — — — — +44 — +160 73.7% +1.86 2–6 (25%) 3–1 (75%) 92.9 -4.22 — — — — — — — — — — — — — — — —
35 1979 2185 156.7 — — — — +75 — +139 71.4% +1.51 8–8 (50%) 9–4 (69%) 94.9 -3.21 — — — — — — — — — — — — — — — —
36 1980 2152 165.5 — — — — +100 +122 +192 69.4% +1.09 9–6 (60%) 11–4 (73%) 100.7 -3.21 — — — — — — — — — — — — — — — —
37 1981 2044 121.4 — — — — +105 — — 44.4% -0.67 — — — -0.51 — — — — — — — — — — — — — — — —
38 1982 1941 150.4 — — — — -6 +196 +304 56.2% +0.42 12–7 (63%) 7–5 (58%) 98.0 -2.64 — — — — — — — — — — — — — — — —
39 1983 2057 155.9 — — — — -43 — +231 79.3% +1.93 2–2 (50%) 0–2 — -1.11 — — — — — — — — — — — — — — — —
Career — 2437 170.4 — — — — +124 -123 +121 77.5% +2.03 131–58 (69%) 74–35 (68%) 111.2 -6.96 — 1942 149.0 — — — — -53 -61 -71 52.5% +0.27 33–46 (42%) 18–22 (45%) 98.6 -5.68

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.