24 Jun 2006
Born
193 cm
Height
80 kg
Weight
right-handed
Plays
Nagoya, Japan
Birthplace
$261,800
Prize money (season)
$487,187
Prize money (career)
Ranking trend
best #133Career record
54 matches29–25
Win–loss
52%
Hard · 22–20
57%
Clay · 4–3
50%
Grass · 2–2
2025
54 matches · 30–24 · 55.6%| Surface | M | W | Titles | Aces | DF | 1st serve | BP conv. | Winners | UE | TB |
|---|---|---|---|---|---|---|---|---|---|---|
| Hardcourt Indoor | 10 | 4 | — | 76 | 25 | 72% | 33% | — | — | 1–2 |
| Hardcourt Outdoor | 38 | 23 | 2 | 328 | 92 | 72% | 38% | — | — | 10–9 |
| Red Clay | 6 | 3 | — | 41 | 9 | 67% | 21% | — | — | 3–0 |
2024
16 matches · 9–7 · 56.2%| Surface | M | W | Titles | Aces | DF | 1st serve | BP conv. | Winners | UE | TB |
|---|---|---|---|---|---|---|---|---|---|---|
| Hardcourt Indoor | 4 | 2 | — | 18 | 8 | 63% | 8% | — | — | 0–1 |
| Hardcourt Outdoor | 11 | 7 | 2 | 68 | 19 | 74% | 42% | — | — | 3–2 |
| Red Clay | 1 | 0 | — | 3 | 1 | 57% | 12% | — | — | — |
M = matches · W = wins · DF = double faults · BP conv. = break points converted · UE = unforced errors · TB = tiebreaks won–lost.
—
Davis Cup
J. Watt
R. Sakamoto
–
–
FT
Davis Cup
A. Shepp
R. Sakamoto
5
7
4
6
0
2
FT
Shanghai, China
hard
R. Sakamoto
(1)
J. Nam
(Q)
6
7
4
6
0
2
FT
US Open, Men
hard
R. Sakamoto
(Q)
F. Tiafoe
(11)
3
6
6
7
5
7
0
3
FT
US Open, Men
hard
A. Vukić
R. Sakamoto
(Q)
4
6
7
6
4
6
6
3
4
6
2
3
FT
US Open, Men
hard
K. Nishikori
(WC)
R. Sakamoto
4
6
6
7
0
2
FT
US Open, Men
hard
R. Sakamoto
A. Muller
(23)
6
3
6
3
2
0
FT
US Open, Men
hard
J. Clarke
R. Sakamoto
6
4
3
6
4
6
1
2
—
US Open, Men
hard
Z. Zhang
R. Sakamoto
–
–
FT
Quebec City, Canada
hard
R. Sakamoto
L. Van Assche
(2)
6
4
4
6
6
7
1
2
FT
Quebec City, Canada
hard
J. Rodionov
(A)
R. Sakamoto
1
6
4
6
0
2
FT
Brownsburg, USA
hard
D. Milavsky
(WC)
R. Sakamoto
(3)
6
3
6
3
2
0
FT
Brownsburg, USA
hard
D. Suresh
(Q)
R. Sakamoto
(3)
5
7
3
6
0
2
FT
Brownsburg, USA
hard
U. Blanchet
R. Sakamoto
(3)
7
6
6
7
6
7
1
2
FT
Lexington, USA
hard
R. Sakamoto
(6)
E. Butvilas
6
7
6
3
5
7
1
2
FT
Lexington, USA
hard
R. Sakamoto
(6)
M. Mmoh
6
4
6
4
2
0
FT
Lexington, USA
hard
R. Sakamoto
(6)
A. Mayo
(Q)
7
6
7
5
2
0
—
ATP Challenger Newport, USA Men Singles
grass
J. McCabe
R. Sakamoto
–
–
FT
Cary, USA
hard
R. Sakamoto
(1)
T. Legout
4
6
3
6
0
2
FT
Cary, USA
hard
R. Sakamoto
(1)
J. Leroux
(WC)
6
3
6
7
6
2
2
1