H2H data updated: 2026-09-07 00:00 UTC

Jun Kuki vs Toshiro Sakai H2H: 0-1

Toshiro Sakai holds a 1–0 lead over Jun Kuki in their ATP head-to-head. Across 1 main-draw meeting, Toshiro Sakai leads 1–0 on grass. Most recently, Toshiro Sakai won the 1972 US Open round of 128 6-2 7-5 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 – 1

1 main-draw meetings

Toshiro Sakai

JPN Age 78 Right-Handed

H2H Match Log

Player	Score	Player	Match Data	Date	Round	Tournament	Category	Surface
Toshiro Sakai	6-2 7-5 6-4	Jun Kuki	Match data	Sep 1, 1972*	R128	US Open	Grand Slam	Grass

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
Toshiro Sakai	—	—	—	1,644	—	—	—	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	Jun Kuki							Toshiro Sakai
Age	Yr	W-L	Win %	Rank	Elo	GS	Titles	Yr	W-L	Win %	Rank	Elo	GS	Titles
22	1968	2–6	25.0%	—	1,450	0	0	—	—	—	—	—	—	—
23	1969	1–4	20.0%	—	1,428	0	0	—	—	—	—	—	—	—
24	1970	3–12	20.0%	—	1,406	0	0	—	—	—	—	—	—	—
25	1971	9–12	42.9%	—	1,494	0	0	—	—	—	—	—	—	—
26	1972	5–12	29.4%	—	1,458	0	0	—	—	—	—	—	—	—
27	1973	3–8	27.3%	#217	1,457	0	0	—	—	—	—	—	—	—
28	1974	10–17	37.0%	#101	1,591	0	0	—	—	—	—	—	—	—
29	1975	11–28	28.2%	#161	1,455	0	0	—	—	—	—	—	—	—
30	1976	19–17	52.8%	#78	1,611	0	0	—	—	—	—	—	—	—
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																	Toshiro Sakai
	Yr	Hard				Clay				Grass				Carpet				Yr	Hard				Clay				Grass				Carpet
	Yr	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	Yr	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %	W	L	M	Win %
20	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1968	—	—	—	—	—	—	—	—	1	2	3	33.3%	—	—	—	—
21	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1969	—	—	—	—	—	—	—	—	0	1	1	0.0%	—	—	—	—
22	1968	0	1	1	0.0%	1	2	3	33.3%	1	3	4	25.0%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
23	1969	—	—	—	—	1	2	3	33.3%	0	2	2	0.0%	—	—	—	—	1971	0	1	1	0.0%	0	3	3	0.0%	3	3	6	50.0%	—	—	—	—
24	1970	1	4	5	20.0%	2	8	10	20.0%	—	—	—	—	—	—	—	—	1972	1	1	2	50.0%	4	4	8	50.0%	2	3	5	40.0%	—	—	—	—
25	1971	3	4	7	42.9%	3	5	8	37.5%	3	3	6	50.0%	—	—	—	—	1973	2	2	4	50.0%	3	8	11	27.3%	3	2	5	60.0%	—	—	—	—
26	1972	2	3	5	40.0%	0	2	2	0.0%	3	5	8	37.5%	0	2	2	0.0%	1974	0	1	1	0.0%	2	3	5	40.0%	0	1	1	0.0%	—	—	—	—
27	1973	2	1	3	66.7%	0	5	5	0.0%	1	2	3	33.3%	—	—	—	—	1975	—	—	—	—	0	3	3	0.0%	0	1	1	0.0%	0	1	1	0.0%
28	1974	6	5	11	54.5%	3	10	13	23.1%	1	2	3	33.3%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
29	1975	1	3	4	25.0%	6	16	22	27.3%	1	3	4	25.0%	3	6	9	33.3%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
30	1976	0	1	1	0.0%	19	16	35	54.3%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
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%	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
37	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1985	0	1	1	0.0%	—	—	—	—	—	—	—	—	—	—	—	—
Career	—	15	23	38	39.5%	45	80	125	36.0%	10	20	30	33.3%	3	11	14	21.4%	—	3	6	9	33.3%	9	21	30	30.0%	9	13	22	40.9%	0	1	1	0.0%

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	Jun Kuki																Toshiro Sakai
Age	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	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1968	1475	92.9	—	—	—	—	—	—	+7	27.3%	-1.91	1–0	—	—	+0.35
21	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1969	1467	101.7	—	—	—	—	—	—	—	0.0%	-2.00	—	—	—	-0.09
22	1968	1450	95.3	—	—	—	—	—	+51	+26	28.6%	-1.24	1–1	—	—	+0.12	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
23	1969	1429	100.1	—	—	—	—	—	+67	—	27.3%	-1.36	0–1	—	—	-0.21	1971	1485	106.1	—	—	—	—	—	-13	+78	31.3%	-1.50	1–0	1–2 (33%)	—	+0.49
24	1970	1406	102.7	—	—	—	—	+97	+39	—	20.6%	-1.82	—	—	—	+0.02	1972	1529	106.2	—	—	—	—	—	-10	+21	51.2%	+0.07	1–3 (25%)	1–2 (33%)	97.0	+1.79
25	1971	1494	105.6	—	—	—	—	+1	-24	-8	44.6%	-0.34	1–1	0–1	—	+1.29	1973	1604	120.0	—	—	—	—	-14	-103	+2	40.4%	-0.50	3–3 (50%)	1–4 (20%)	99.2	+0.19
26	1972	1459	107.2	—	—	—	—	+12	—	+4	31.6%	-1.13	1–3 (25%)	0–1	—	+0.50	1974	1578	106.7	—	—	—	—	—	-73	—	35.0%	-1.00	0–2	1–0	—	+0.35
27	1973	1458	113.8	—	—	—	—	+78	-34	-13	38.7%	-0.39	1–3 (25%)	1–1	—	+0.44	1975	1496	93.2	—	—	—	—	—	-27	—	15.4%	-2.54	0–1	1–0	—	+0.71
28	1974	1592	122.3	—	—	—	—	+41	-171	-166	38.5%	-0.88	5–5 (50%)	6–5 (55%)	103.6	-0.22	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
29	1975	1456	114.7	—	—	—	—	+107	-47	-22	36.2%	-0.93	4–11 (27%)	3–1 (75%)	95.9	+3.22	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
30	1976	1612	137.0	—	—	—	—	—	+8	—	51.2%	+0.07	2–4 (33%)	2–4 (33%)	99.1	+1.67	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
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	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—
37	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	—	1985	1487	97.5	—	—	—	—	—	—	—	0.0%	-4.00	—	—	—	-0.03
Career	—	1663	121.6	—	—	—	—	+58	-17	-19	38.6%	-0.73	16–34 (32%)	14–15 (48%)	94.6	+3.59	—	1645	109.7	—	—	—	—	-14	-57	+32	37.0%	-0.91	6–9 (40%)	5–8 (38%)	97.2	+6.06

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.

Jun Kuki's most-played ATP rivals
Opponent	W	L	M	Last Played	H2H
Ross Case	0	5	5	Oct 22, 1980	H2H
Paolo Bertolucci	0	4	4	Apr 22, 1977	H2H
Dick Crealy	0	4	4	Aug 11, 1976	H2H
Balazs Taroczy	1	2	3	Oct 23, 1981	H2H
Adriano Panatta	0	3	3	Oct 28, 1978	H2H

Toshiro Sakai's most-played ATP rivals
Opponent	W	L	M	Last Played	H2H
Gerald Battrick	0	3	3	Jul 24, 1975	—
Ross Case	1	1	2	Oct 16, 1974	—
Ken Rosewall	0	2	2	Oct 13, 1973	—
Hans Kary	2	0	2	Jun 29, 1973	—
Robert Seguso	0	1	1	Oct 16, 1985	—