Rei Sakamoto and Yasutaka Uchiyama will play each other in the quarter of the Yokohama Challenger for the 2^nd time in their career. They are scheduled to play on Friday at 11:00 am on COURT 3. Here the head to head stats and relative prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Rei Sakamoto who should win in 3 sets.

As per the initial odds, Rei Sakamoto is the pick to win this match.
Rei Sakamoto -> 1.63
Yasutaka Uchiyama -> 2.11

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Prediction and head to head Rei Sakamoto vs. Yasutaka Uchiyama

This will be the 2^nd time that Rei Sakamoto and Yasutaka Uchiyama play each other. The head to head is 1-0 for Uchiyama (see full H2H stats), but they have never played each other on hard.

The last time that they competed against each other, Uchiyama won 6-1 6-2 in the qualifications in the Kobe Challenger back in 2023.

Rei Sakamoto

Ranked no. 176, Rei got to the quarter after beating Kasidit Samrej 6-4 7-6(1) and Maxim Zhukov 6-1 6-2.

In the 2^nd round, The Japanese had a good straight sets win against Zhukov (6-1 6-2). During the match, Sakamoto scored 63 points vs Zhukov’s 39. Rei was pretty aggressive to blast 27 winners.

Regarding the service games, Sakamoto bagged 5 aces and he committed only 3 double faults. Rei Sakamoto conceded no breaks for the entire match to save 5 break points. Furthermore, Sakamoto put 60% of his first serves in, winning 84% (27/32) of the points behind his 1st serve and 48% (10/21) on the 2nd serve. The Japanese broke Zhukov 4 times after converting 57% of his break points (4/7).

Overall Performance in this tournament

Sakamoto hasn’t surrendered yet a set in this competition to conquer 59% of the points he played.

Sakamoto has a winning match record in the last 4 years having won 52% of his matches (63-59). 24-16 on hard in 2025. In connection with his performance on the same surface of this competition, Sakamoto has an aggregate42-34 record in the last 4 years on hard.

His best result of the season was winning the title the Cary Challenger where he overcame Liam Draxl in the final 6-1 6-4.

Rei has an overall 31-26 win-loss record in 2025, 24-16 on hard (See FULL STATS).

Previously in the Yokohama Challenger

Yasutaka Uchiyama

Ranked no. 330, Uchiyama reached the quarter after beating Tsung-Hao Huang 6-4 7-6(11) and Michael Vrbensky 6-3 6-3.

In the 2^nd round, The Japanese had a good straight sets win against Vrbensky (6-3 6-3). During the match Uchiyama scored 63 points vs Vrbensky’s 49. Uchiyama was exceptionally aggressive to blast 26 winners.

Talking about serving, Uchiyama recorded 5 aces and he was quite steady in conceding no double faults for the entire match. Overall, Yasutaka Uchiyama was extremely efficient on serve to win 72% (26/36) of his 1st serve and 56% (9/16) on the second serve. However, this didn’t prevent his to concede the serve once. The Japanese broke Vrbensky 4 times after converting 50% of his break points (4/8).

Overall Performance in this tournament

Yasutaka hasn’t dropped yet a set in the tournament to win 54% of the points he played.

The Japanese’s best result of the year was reaching the final in the Shanghai Challenger.

The Japanese has a compiled 23-28 win-loss record in 2025, 19-21 on hard (See FULL STATS).

Previously in the Yokohama Challenger

Previously, he won this tournament once in 2018. See his history.

H2H Performance in the tournament (main draw)

Matches, sets, games and points

Points	Sakamoto	Uchiyama
Match played	2	2
Tot Set	4	4
Tot Games	38	41
Pts	137-96	155-133
Total Points	233	288
Winners	62	67
%Winners	45%	43%

Both Sakamoto and Uchiyama played 2 matches. Both players have not surrendered a single set in this event so far. Talking about their workload, Sakamoto and Uchiyama have played the same amount of sets 4. However, Sakamoto played 3 games less than Uchiyama. Rei scored 62 winners (45% of the total points). On the other side, Uchiyama recorded 67 winners (43%).

Serve Performance

Serve	Sakamoto	Uchiyama
Aces	18	10
Avg per match	9	5
1st in	72/109	91/138
%1st in	66%	66%
1st pts	62/72	67/91
%1st pts	86%	74%
2nd pts	20/37	28/47
%2nd pts	54%	60%

Sakamoto bagged 18 aces (9 per match). Uchiyama made 10 aces (5 per match). Sakamoto won 86% points on his first serve. He quite strong on his second serve to win 54% of the points. On the other side, Uchiyama won 74% of the points on his first serve. He had a solid display on his second serve to win 60% of the points.

How they played the important points

Breaks	Sakamoto	Uchiyama
Won	6	6
Converted	6/13	6/13
% Converted	46%	46%
Conceded	7	8
Saved	6	6
% Saved	86%	75%
Times Broken	1	2

The Japanese broke his opponents 6 times with a 46% conversion rate. Sakamoto dropped his serve once and he saved 86% of the break points that he conceded. The Japanese broke his opponents 6 times with a 46% conversion rate. Yasutaka conceded his serve twice and he saved 75% of the break points that he conceded.

Sakamoto
	R1 Samrej	R2 Zhukov	Total
Score	6-4 7-61	6-1 6-2
Tot Set	2	2	4
Tot Games	23	15	38
pts	74-57	63-39	137-96
Total points	131	102	233
Winners	35	27	62
%Winners	47%	43%	45%
SERVE
Aces	13	5	18
Double Faults	0	3	3
1st in	40/56	32/53	72/109
% 1st in	71%	60%	66%
1st pts	35/40	27/32	62/72
% 1st pts	88%	84%	86%
2nd pts	10/16	10/21	20/37
% 2nd pts	63%	48%	54%
Breaks
Won	2	4	6
Converted	2/6	4/7	6/13
Converted %	33%	57%	46%
Conceded	2	5	7
Saved	1/2	5/5	6
Saved %	50%	100%	75%
Times Broken	1	0	1

Uchiyama
	R1 Huang	R2 Vrbensky	Total
Score	6-4 7-611	6-3 6-3
Tot Set	2	2	4
Tot Games	23	18	41
pts	92-84	63-49	155-133
Total points	176	112	288
Winners	41	26	67
%Winners	45%	41%	43%
SERVE
Aces	5	5	10
Double Faults	2	0	2
1st in	55/86	36/52	91/138
% 1st in	64%	69%	66%
1st pts	41/55	26/36	67/91
% 1st pts	75%	72%	74%
2nd pts	19/31	9/16	28/47
% 2nd pts	61%	56%	60%
Breaks
Won	2	4	6
Converted	2/5	4/8	6/13
Converted %	40%	50%	46%
Conceded	5	3	8
Saved	4/5	2/3	6
Saved %	80%	67%	74%
Times Broken	1	1	2

Tennis Scores in Yokohama Challenger

• Neil Oberleitner/Michael VrbenskyOberleitner/Michael Vrbensky – Yusuke Kusuhara/Shunsuke NakagawaKusuhara/Shunsuke Nakagawa (6-3 6-3) – Stats, scores, rankings

Upcoming matches in the draw

• Kei NishikoriNishikori – Kaichi UchidaUchida (0-0) – H2H and prediction
• Yasutaka UchiyamaUchiyama – (1-0) – H2H and prediction
• Igor Ribeiro MarcondesRibeiro Marcondes – Neil OberleitnerOberleitner (0-0) – H2H and prediction