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

Kaoru Okamoto vs Roberta Mccallum H2H: 0-1

Roberta Mccallum holds a 1–0 lead over Kaoru Okamoto in their WTA head-to-head. Across 1 main-draw meeting, Roberta Mccallum leads 1–0 on hard courts. Most recently, Roberta Mccallum won the 1981 Tokyo Japan Open round of 32 7-6 6-3.

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

Kaoru Okamoto
JPN Age 61 Right-Handed
H2H
0 – 1
1 main-draw meetings
Roberta Mccallum
USA Age 67

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Roberta Mccallum 7-6 6-3 Kaoru Okamoto Match data Oct 22, 1981* R32 Tokyo Japan Open 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
Kaoru Okamoto #225 #75 14 1,589 23 44 34.3% 0 0 0 1 0 1
Roberta Mccallum — — — 1,660 24 43 35.8% 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 Kaoru Okamoto Roberta Mccallum
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
13 1978 0–1 0.0% — 1,483 0 0 — — — — — — —
15 1980 0–2 0.0% — 1,466 0 0 — — — — — — —
16 1981 0–3 0.0% — 1,441 0 0 — — — — — — —
18 1983 3–2 60.0% — 1,473 0 0 — — — — — — —
19 1984 0–1 0.0% #189 1,465 0 0 1978 0–1 0.0% — 1,484 0 0
20 1985 0–1 0.0% — 1,449 0 0 1979 6–5 54.5% — 1,573 0 0
21 1986 2–1 66.7% #151 1,479 0 0 1980 14–27 34.1% — 1,582 0 0
22 1987 6–8 42.9% #107 1,542 0 0 1981 4–9 30.8% — 1,568 0 0
23 1988 1–8 11.1% #208 1,495 0 0 1982 0–1 0.0% — 1,549 0 0
24 1989 5–7 41.7% #115 1,507 0 1 — — — — — — —
25 1990 3–6 33.3% #165 1,496 0 1 — — — — — — —
26 1991 2–2 50.0% #183 1,534 0 1 — — — — — — —
27 1992 1–2 33.3% #225 1,535 0 1 — — — — — — —

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 Kaoru Okamoto Roberta Mccallum
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 %
13 1978 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
15 1980 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
16 1981 0 2 2 0.0% — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
18 1983 2 1 3 66.7% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
19 1984 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
20 — — — — — — — — — — — — — — — — — 1979 — — — — — — — — 3 4 7 42.9% — — — —
21 1986 2 1 3 66.7% — — — — — — — — — — — — 1980 3 4 7 42.9% 0 3 3 0.0% 1 4 5 20.0% 10 16 26 38.5%
22 1987 3 3 6 50.0% 0 1 1 0.0% 3 3 6 50.0% 0 1 1 0.0% 1981 2 4 6 33.3% 0 1 1 0.0% 0 1 1 0.0% 2 3 5 40.0%
23 1988 0 4 4 0.0% 0 1 1 0.0% 1 2 3 33.3% 0 1 1 0.0% 1982 0 1 1 0.0% — — — — — — — — — — — —
24 1989 5 2 7 71.4% 0 1 1 0.0% 0 3 3 0.0% 0 1 1 0.0% — — — — — — — — — — — — — — — — —
25 1990 3 2 5 60.0% 0 1 1 0.0% 0 1 1 0.0% 0 2 2 0.0% — — — — — — — — — — — — — — — — —
26 1991 2 1 3 66.7% — — — — — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
27 1992 — — — — — — — — — — — — 1 2 3 33.3% — — — — — — — — — — — — — — — — —
Career — 17 17 34 50.0% 0 6 6 0.0% 4 9 13 30.8% 1 9 10 10.0% — 5 9 14 35.7% 0 4 4 0.0% 4 9 13 30.8% 12 19 31 38.7%

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 Kaoru Okamoto Roberta Mccallum
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
13 1978 1484 94.1 — — — — — — — 0.0% -4.50 — — — +0.24 — — — — — — — — — — — — — — — —
15 1980 1466 98.1 — — — — — — — 0.0% -4.00 — — — -0.26 — — — — — — — — — — — — — — — —
16 1981 1441 93.7 — — — — +118 — — 14.3% -3.00 0–1 0–1 — +0.23 — — — — — — — — — — — — — — — —
18 1983 1474 101.6 — — — — +92 — — 53.3% 0.00 3–2 (60%) 1–1 — +0.60 — — — — — — — — — — — — — — — —
19 1984 1466 100.5 — — — — — — — 33.3% -0.67 0–1 — — -0.03 1978 1484 96.8 — — — — — — — 0.0% -3.50 — 0–1 — +0.04
20 1985 1450 92.5 — — — — — — — 0.0% -5.00 — — — +0.04 1979 1573 116.3 — — — — — — +15 50.0% -0.46 1–3 (25%) 1–0 — -0.41
21 1986 1480 106.1 — — — — +81 — — 57.1% +1.43 1–0 0–2 — +0.49 1980 1582 127.2 — — — — +6 -80 -45 35.9% -1.14 5–5 (50%) 1–2 (33%) 99.9 +1.55
22 1987 1543 119.7 — — — — +26 — +59 43.3% -0.07 1–1 0–3 (0%) — +0.51 1981 1568 107.3 — — — — +56 — — 33.3% -1.81 0–1 2–1 (67%) — +0.48
23 1988 1496 101.8 — — — — -12 — +74 20.0% -2.20 0–2 — — -0.11 1982 1549 95.7 — — — — — — — 0.0% -4.00 — — — +0.17
24 1989 1508 102.8 — — — — +50 — +5 42.3% -0.73 1–1 0–1 — +1.66 — — — — — — — — — — — — — — — —
25 1990 1496 100.2 — — — — +51 — — 31.6% -1.11 1–0 0–1 — +0.82 — — — — — — — — — — — — — — — —
26 1991 1534 117.3 — — — — +41 — — 50.0% +0.38 — 0–1 — -0.21 — — — — — — — — — — — — — — — —
27 1992 1536 100.8 — — — — +39 — — 28.6% -2.00 1–0 1–1 — +0.29 — — — — — — — — — — — — — — — —
51 2016 1516 — — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 1590 107.9 — — — — +47 — +49 36.0% -0.97 8–8 (50%) 2–11 (15%) 94.2 +6.37 — 1661 121.1 — — — — +19 -80 -10 36.6% -1.23 6–9 (40%) 4–4 (50%) 98.5 +2.73

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.