Prediction of Jumpei Yamasaki vs Keita Koyama Head-to-Head, At

Wojtek Kolan

Our Predictions

H2H Records Career Stats

HEAD TO HEAD
J. Yamasaki vs K. Koyama

Jumpei Yamasaki

JPN

1

Win

Played

0

Win

Age

5'11" (180 cm)

Height

5'7" (170 cm)

876

C. Rank

Ret.

446

Best Rank

896

Total Titles

YTD Titles

Career Money

Right-Handed

Plays

Right-Handed

Keita Koyama

JPN

1

Win

Played

0

Win

Age

5'11" (180 cm)

Height

5'7" (170 cm)

876

C. Rank

Ret.

446

Best Rank

896

Total Titles

YTD Titles

Career Money

Right-Handed

Plays

Right-Handed

Head-to-head: Yamasaki 1 - 0 Koyama

They have played 3 sets in total, with Jumpei Yamasaki winning 2 and Keita Koyama winning 1. The last match between Jumpei Yamasaki and Keita Koyama was at the Japan F7, 15-06-2015, Round: R1, Surface: Carpet, with Jumpei Yamasaki getting the victory 4-6 6-4 5-1 ret..

Players	Head To Head Match Wins
Yamasaki	1
Koyama	0

Last 1 H2H Matches:

(R1) Japan F7(06-15-15)

Stats

Jumpei Yamasaki

Keita Koyama

J. Yamasaki vs K. Koyama H2H Profile

J. Yamasaki	Stats	K. Koyama
$0	Career Prize Money	$0
57.92% (267-194)	Career Total W/L	43.59% (34-44)
1	Indoor	0
3	Titles	0
1	Total H2H Matches	0
0% (0-0)	YTD Win/Loss	0% (0-0)

J. Yamasaki vs K. Koyama Match Preview:

Second serve performance recent form: In recent form (last 6 months), Jumpei Yamasaki has won 41.53% of points on their second serve, while Keita Koyama has won 0%. There is a high correlation between this stat and match prediction accuracy.
Return game stats recent form: Return stats show Jumpei Yamasaki, in recent form, has won 49.45% of their opponent's second serve points, while Keita Koyama has won 0%. The same stats for first serve returns are 27.39% and 0% respectively and this has a high correlation to pick who is favored in this H2H matchup.
Under pressure analysis: Jumpei Yamasaki has saved 48.91% of breakpoints in recent form, whereas Keita Koyama has saved 0% which is a useful statistic for in-game betting predictions.
Performance overview: Over the last year Jumpei Yamasaki has won 63.46% of matches played (W/L 33/19), with Keita Koyama winning 0% (W/L 0/0) that gives us an overall head-to head prediction overview.
Best surface: Jumpei Yamasaki has their best career surface win % on I.hard, winning 60% (W/L 18/12), and worse career win % on Clay, winning 55% (W/L 31/25). Keita Koyama has their best career surface win % on Grass, winning 60% (W/L 3/2), and worse career win % on I.hard, winning 0% (W/L 0/1).
Player level: In the last year, Jumpei Yamasaki has played most of their matches on the Futures/Satellites/ITF tournaments $10K, winning 63.27% of matches (W/L 31/18), where as Keita Koyama has played most of their matches on the N/A, winning 0% of matches (W/L 0/0). When comparing stats between players to predict the favorite, it is of course all relative to the event level they have been playing at.
Direct H2H matches: They have played 1 times before with Jumpei Yamasaki winning 1 times and Keita Koyama being victorious 0 times. They have played 3 sets in total, with Jumpei Yamasaki winning 2 and Keita Koyama winning 1.
The last match between Jumpei Yamasaki and Keita Koyama was at the Japan F7, 15-06-2015, Round: R1, Surface: Carpet, with Jumpei Yamasaki getting the victory 4-6 6-4 5-1 ret..
Head to head match duration: In past head to head matches, the average match time between these players has been 0:0:0.
Opponent quality stats: Over the last 12 months, Jumpei Yamasaki has played against opponents with an average rank of 411.69 while Keita Koyama has played against players with an average rank of 0.
Deciding set performance vs all players: If you are interested in live predictions and betting, if this match goes into a deciding set, Jumpei Yamasaki has won 30% of deciding sets over the last 12 months, while Keita Koyama has won 0% in all matches played on tour.
Break point conversion: In recent form, Jumpei Yamasaki has converted 29.11% of breakpoint opportunities, and Keita Koyama has converted 0% of their chances to break their opponents serve. A telling stat for in-game live betting tips when either player has a breakpoint opportunity.

Jumpei Yamasaki vs Keita Koyama Editorial Preview By TennisTipster88.

J. Yamasaki vs K. Koyama H2H Stats Used In Our Predictions

J. Yamasaki	Stats	K. Koyama
1	H2H Matches Won	0
2	Sets Won	1
15	Games Won	11
0:0:0	Average Match Time	0:0:0
100% (1/1)	Best‑of‑5 Win %	0% (0/1)
0% (0/0)	1st Set Won, Won Match	0% (0/1)
0% (0/0)	1st Set Won, Lost Match	100% (1/1)
100% (1/1)	1st Set Lost, Won Match	0% (0/0)

Recent Performance Stats

J. Yamasaki Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Yokohama Challenger - 17-11-2025
R1 Yuki MochizukiY. Mochizuki	L	6-4 7-6(5)	Stats
Q3 Naoki NakagawaN. Nakagawa	W	6-3 6-1	Stats
Q1 Uisung ParkU. Park	W	6-4 ret.	Stats
M25 Takasaki - 15-09-2025
QF Takuya KumasakaT. Kumasaka	L	6-7(6) 6-0 6-3	Stats
R2 Taiyo YamanakaT. Yamanaka	W	6-2 6-3	Stats

View All

K. Koyama Recent Matches Played

OPPONENT	RESULT	SCORE	H2H
Chinese Taipei F1 - 17-08-2015
R1 Tsung-Hua YangT. Yang	L	6-3 6-3	Stats
Japan F7 - 15-06-2015
R1 Jumpei YamasakiJ. Yamasaki	L	4-6 6-4 5-1 ret.	Stats
Japan F6 - 08-06-2015
R1 Masayoshi OnoM. Ono	L	4-6 6-2 6-1	Stats
Japan F5 - 01-06-2015
R1 Keisuke WatanukiK. Watanuki	L	6-1 6-1	Stats
Japan F3 - 23-03-2015
Q2 Ryota HisamatsuR. Hisamatsu	W	6-3 6-2	Stats

View All

J. Yamasaki vs K. Koyama Stats Breakdown Vs All H2H Opponents

J. Yamasaki	Stats	K. Koyama
57.92% (267/194)	YTD Win/Loss	43.59% (34/44)
56.08% (581/455)	Sets Win/Loss	44.32% (78/98)
52.77% (5039/4510)	Games Win/Loss	45.86% (726/857)
58.24% (212/152)	Hard Win/Loss	44.23% (23/29)
55.36% (31/25)	Clay Win/Loss	50.00% (7/7)
58.54% (24/17)	Indoor Hard W/L	14.29% (1/6)
0% (0/0)	Grass Win/Loss	60.00% (3/2)
0.22	Aces Per Game	0.01
1018	Aces Total	9
0.1	Double Faults Per Game	0.02
451	Total Double Faults	18
1:21:6	Average Match Time	1st Match
501.09	Average Opponent Rank	475.26
64% (14608/22757)	1st Serve %	69% (362/528)
66% (9578/14608)	1st Serve Win %	64% (232/362)
50% (4040/8149)	2nd Serve Win %	52% (87/166)
44% (1037/2340)	Break Points Won % (Total)	55% (22/40)
41% (9507/23232)	Return Points Win %	39% (196/507)
38.46% (15/24)	Challenger W/L	45.45% (5/6)
59.72% (252/170)	Futures W/L	43.28% (29/38)
57% (256/448)	Best of 3 Sets Win %	44% (33/75)
100% (6/6)	Best of 5 Sets Win %	50% (1/2)
51% (56/109)	Tiebreaks Win % (Total)	59% (10/17)
54% (62/115)	Deciding Set Win %	53% (10/19)
88% (261/229)	1st Set Won, Won Match	79% (33/26)
12% (261/32)	1st Set Won, Lost Match	21% (33/7)
19% (199/37)	1st Set Lost, Won Match	18% (45/8)