H2H data updated: 2026-09-02 00:00 UTC

Jun Kuki vs Geoff Masters H2H: 0-2

Geoff Masters holds a 2–0 lead over Jun Kuki in their ATP head-to-head. Across 2 main-draw meetings, Geoff Masters leads 1–0 on carpet and 1–0 on hard courts. Most recently, Geoff Masters won the 1979 Tokyo Indoor round of 32 6-2 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.

Jun Kuki
JPN Age 80 Right-Handed
H2H
0 – 2
2 main draw meetings
Geoff Masters
AUS Age 75 Right-Handed

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Geoff Masters #61 6-2 6-4 Jun Kuki Match data Nov 2, 1979* R32 Tokyo Indoor ATP 250 Carpet
Geoff Masters 6-4 9-8 Jun Kuki Match data Apr 1, 1972* R32 Hong Kong ATP 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
Jun Kuki #523 #78 0 1,662 73 134 35.3% 0 0 0 0 0 0
Geoff Masters #826 #42 0 1,889 237 253 48.4% 0 0 0 0 2 2

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 Jun Kuki Geoff Masters
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 — — — — — — — 1968 2–2 50.0% — 1,511 0 0
18 — — — — — — — 1969 7–6 53.8% — 1,542 0 0
19 — — — — — — — 1970 10–7 58.8% — 1,581 0 0
20 — — — — — — — 1971 19–22 46.3% — 1,573 0 0
21 — — — — — — — 1972 18–18 50.0% — 1,670 0 0
22 1968 2–6 25.0% — 1,450 0 0 1973 28–23 54.9% #52 1,756 0 0
23 1969 1–4 20.0% — 1,428 0 0 1974 23–21 52.3% #53 1,766 0 1
24 1970 3–12 20.0% — 1,406 0 0 1975 27–24 52.9% #44 1,812 0 1
25 1971 9–12 42.9% — 1,494 0 0 1976 27–31 46.6% #53 1,780 0 2
26 1972 5–12 29.4% — 1,458 0 0 1977 22–27 44.9% #83 1,662 0 2
27 1973 3–8 27.3% #217 1,457 0 0 1978 20–20 50.0% #59 1,701 0 2
28 1974 10–17 37.0% #101 1,591 0 0 1979 21–23 47.7% #62 1,728 0 2
29 1975 11–28 28.2% #161 1,455 0 0 1980 13–28 31.7% #166 1,517 0 2
30 1976 19–17 52.8% #78 1,611 0 0 1981 0–1 0.0% — 1,501 0 2
31 1977 3–11 21.4% #171 1,548 0 0 — — — — — — —
32 1978 3–2 60.0% #146 1,587 0 0 — — — — — — —
33 1979 1–2 33.3% #389 1,578 0 0 — — — — — — —
34 1980 0–1 0.0% #356 1,566 0 0 — — — — — — —
35 1981 2–1 66.7% — 1,598 0 0 — — — — — — —
36 1982 1–1 50.0% — 1,597 0 0 — — — — — — —

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 Jun Kuki Geoff Masters
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 %
17 — — — — — — — — — — — — — — — — — 1968 — — — — — — — — 2 2 4 50.0% — — — —
18 — — — — — — — — — — — — — — — — — 1969 — — — — 3 3 6 50.0% 4 3 7 57.1% — — — —
19 — — — — — — — — — — — — — — — — — 1970 — — — — 4 3 7 57.1% 6 4 10 60.0% — — — —
20 — — — — — — — — — — — — — — — — — 1971 3 9 12 25.0% 5 6 11 45.5% 11 7 18 61.1% — — — —
21 — — — — — — — — — — — — — — — — — 1972 11 5 16 68.8% 5 5 10 50.0% 2 7 9 22.2% 0 1 1 0.0%
22 1968 0 1 1 0.0% 1 2 3 33.3% 1 3 4 25.0% — — — — 1973 8 4 12 66.7% 15 13 28 53.6% 5 6 11 45.5% — — — —
23 1969 — — — — 1 2 3 33.3% 0 2 2 0.0% — — — — 1974 2 8 10 20.0% 11 5 16 68.8% 9 4 13 69.2% 1 4 5 20.0%
24 1970 1 4 5 20.0% 2 8 10 20.0% — — — — — — — — 1975 9 9 18 50.0% 5 6 11 45.5% 6 3 9 66.7% 7 6 13 53.8%
25 1971 3 4 7 42.9% 3 5 8 37.5% 3 3 6 50.0% — — — — 1976 11 6 17 64.7% 6 9 15 40.0% 3 5 8 37.5% 7 11 18 38.9%
26 1972 2 3 5 40.0% 0 2 2 0.0% 3 5 8 37.5% 0 2 2 0.0% 1977 15 11 26 57.7% 0 2 2 0.0% 5 9 14 35.7% 2 5 7 28.6%
27 1973 2 1 3 66.7% 0 5 5 0.0% 1 2 3 33.3% — — — — 1978 7 5 12 58.3% 3 2 5 60.0% 4 4 8 50.0% 6 9 15 40.0%
28 1974 6 5 11 54.5% 3 10 13 23.1% 1 2 3 33.3% — — — — 1979 2 4 6 33.3% 4 3 7 57.1% 9 6 15 60.0% 6 10 16 37.5%
29 1975 1 3 4 25.0% 6 16 22 27.3% 1 3 4 25.0% 3 6 9 33.3% 1980 2 6 8 25.0% 2 7 9 22.2% 1 6 7 14.3% 8 9 17 47.1%
30 1976 0 1 1 0.0% 19 16 35 54.3% — — — — — — — — 1981 — — — — — — — — 0 1 1 0.0% — — — —
31 1977 0 1 1 0.0% 3 9 12 25.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
32 1978 — — — — 3 1 4 75.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
33 1979 — — — — 1 1 2 50.0% — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — —
34 1980 — — — — 0 1 1 0.0% — — — — — — — — — — — — — — — — — — — — — — — — —
35 1981 — — — — 2 1 3 66.7% — — — — — — — — — — — — — — — — — — — — — — — — —
36 1982 — — — — 1 1 2 50.0% — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 15 23 38 39.5% 45 80 125 36.0% 10 20 30 33.3% 3 11 14 21.4% — 70 67 137 51.1% 63 64 127 49.6% 67 67 134 50.0% 37 55 92 40.2%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. 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 Jun Kuki Geoff Masters
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
17 — — — — — — — — — — — — — — — — 1968 1511 104.2 — — — — — — +30 54.5% +0.45 — — — +0.07
18 — — — — — — — — — — — — — — — — 1969 1542 108.7 — — — — — +20 -1 53.1% +0.47 2–1 (67%) — — +1.09
19 — — — — — — — — — — — — — — — — 1970 1581 113.8 — — — — — +4 +1 48.9% +0.09 2–0 0–1 — +2.04
20 — — — — — — — — — — — — — — — — 1971 1573 113.6 — — — — -110 +36 +80 44.4% -0.32 9–3 (75%) 1–3 (25%) — +2.45
21 — — — — — — — — — — — — — — — — 1972 1670 122.7 — — — — -2 -18 -123 48.0% +0.02 6–6 (50%) 3–4 (43%) — +1.43
22 1968 1450 95.3 — — — — — +51 +26 28.6% -1.24 1–1 — — +0.12 1973 1756 140.1 — — — — 0 -38 -146 52.2% +0.18 11–7 (61%) 8–9 (47%) — -1.32
23 1969 1429 100.1 — — — — — +67 — 27.3% -1.36 0–1 — — -0.21 1974 1766 141.0 — — — — -125 +49 -11 52.2% +0.31 8–7 (53%) 3–6 (33%) — -2.52
24 1970 1406 102.7 — — — — +97 +39 — 20.6% -1.82 — — — +0.02 1975 1812 148.9 — — — — -23 -36 +8 53.0% +0.27 10–12 (45%) 6–8 (43%) — -3.09
25 1971 1494 105.6 — — — — +1 -24 -8 44.6% -0.34 1–1 0–1 — +1.29 1976 1781 148.0 — — — — +86 -91 -12 48.5% +0.04 4–8 (33%) 9–4 (69%) — -2.30
26 1972 1459 107.2 — — — — +12 — +4 31.6% -1.13 1–3 (25%) 0–1 — +0.50 1977 1662 120.4 — — — — +90 — -42 44.1% -0.40 8–10 (44%) 6–9 (40%) — +2.97
27 1973 1458 113.8 — — — — +78 -34 -13 38.7% -0.39 1–3 (25%) 1–1 — +0.44 1978 1701 140.0 — — — — +47 -24 -35 51.0% +0.09 5–8 (38%) 5–5 (50%) — +1.79
28 1974 1592 122.3 — — — — +41 -171 -166 38.5% -0.88 5–5 (50%) 6–5 (55%) — -0.22 1979 1729 143.8 — — — — -31 -3 -1 48.1% -0.11 8–8 (50%) 8–7 (53%) — -2.12
29 1975 1456 114.7 — — — — +107 -47 -22 36.2% -0.93 4–11 (27%) 3–1 (75%) — +3.22 1980 1518 124.9 — — — — +79 +146 +101 36.6% -0.87 4–8 (33%) 8–8 (50%) — -0.05
30 1976 1612 137.0 — — — — — +8 — 51.2% +0.07 2–4 (33%) 2–4 (33%) — +1.67 1981 1501 94.8 — — — — — — — 0.0% -4.00 — — — +0.19
31 1977 1548 117.9 — — — — — +32 — 28.1% -1.66 0–3 (0%) 1–1 — +0.17 — — — — — — — — — — — — — — — —
32 1978 1587 113.7 — — — — — +35 — 54.5% +0.64 1–0 0–1 — +0.21 — — — — — — — — — — — — — — — —
33 1979 1579 107.2 — — — — — — — 42.9% -0.14 0–1 — — +0.13 — — — — — — — — — — — — — — — —
34 1980 1566 100.7 — — — — — — — 0.0% -3.00 — — — 0.00 — — — — — — — — — — — — — — — —
35 1981 1598 110.7 — — — — — +26 — 66.7% +0.17 — 1–0 — -0.14 — — — — — — — — — — — — — — — —
36 1982 1597 106.2 — — — — — — — 60.0% +1.40 0–1 — — +0.16 — — — — — — — — — — — — — — — —
Career — 1663 121.6 — — — — +58 -17 -19 38.6% -0.73 16–34 (32%) 14–15 (48%) 94.6 +3.59 — 1890 139.6 — — — — +20 -4 -11 48.2% -0.04 77–78 (50%) 57–64 (47%) 99.9 +0.13

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.