Chun Hsin Tseng and Rei Sakamoto will square off in the quarter of the Kobe Challenger for the 1^st time in their career. They are scheduled to compete on Friday at 11:00 am on CENTER COURT. Here the head to head stats and relative prediction.

Prediction, odds and live streaming

The pick for Tennis Tonic is Chun Hsin Tseng who should win in 3 sets.

As per the initial odds, Chun Hsin Tseng is the pick to win this match.
Chun Hsin Tseng -> 1.81
Rei Sakamoto -> 1.87

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Prediction and head to head Chun Hsin Tseng vs. Rei Sakamoto

There is no head to head record between Chun Hsin Tseng and Rei Sakamoto since this will be the first time that they will play each other in the main tour.

Chun Hsin Tseng

Ranked no. 131, the Chinese reached the quarter after beating Dimitar Kuzmanov 6-4 6-1 and Hyeon Chung 1-6 6-2 7-5.

In the 2^nd round against Chung, Chun recovered from a 1-set down deficit before winning (1-6 6-2 7-5).During the match, Hsin Tseng scored less points (1) than Chung. In fact, the world no. 131 won 90 points vs Chung’s. That means that Hsin Tseng was more focused during the important points. Hsin Tseng was pretty aggressive to blast 30 winners.

Talking about the service games, Hsin Tseng fired 2 aces and he committed only 1 double fault. Chun Hsin Tseng lost the serve 5 times and he saved 3 break points. Furthermore, Hsin Tseng put 59% of his first serves in, winning 58% (30/52) of the points behind his 1st serve and 50% (18/36) on the 2nd serve. Chun broke Chung 6 times after converting 33% of his break points (6/18).

Overall Performance in this tournament

Chun has dropped 1 set in this competition to win 53% of the points he played.

Hsin Tseng has positive record in the last 10 years having won 57% of his matches (269-199). 4-4 on indoor hard courts in 2025. Talking about his performance on the same surface of this tournament, Hsin Tseng has an aggregate 24-23 match record in the last years on indoor hard courts.

His best result of the year was winning the title the Vicenza Challenger where he beat Lukas Neumayer in the final 6-3 6-4.

Chun has an overall 32-34 win-loss record in 2025, 4-4 on indoor hard courts (See FULL STATS).

Previously in the Kobe Challenger

Rei Sakamoto

Ranked no. 180, the Japanese got to the quarter after defeating Max Basing 7-6(6) 6-7(4) 6-3 and Hynek Barton 3-6 6-3 6-4.

In the 2^nd round against Barton, Sakamoto recovered from a 1-set down deficit before winning (3-6 6-3 6-4). During the match Sakamoto scored 95 points vs Barton’s 90. The Japanese was quite aggressive to blast 48 winners.

Talking about serving, Sakamoto struck 8 aces and he committed only 4 double faults. Rei Sakamoto lost the serve twice and he saved 11 break points. Furthermore, Sakamoto put 66% of his first serves in, winning 77% (48/62) of the points behind his 1st serve and 41% (13/32) on the 2nd serve. Sakamoto broke Barton 3 times after converting 38% of his break points (3/8).

Overall Performance in this tournament

Sakamoto has conceded 2 set in the tournament to win 53% of the points he played.

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

The Japanese has an aggregate 29-25 win-loss record in 2025, 4-6 on indoor hard courts (See FULL STATS).

Previously in the Kobe Challenger

Previously, his best result was reaching the 1^st round in 2024. See his history.

H2H Performance in the tournament (main draw)

Matches, sets, games and points

Points	Hsin Tseng	Sakamoto
Match played	2	2
Tot Set	5	6
Tot Games	44	63
Pts	150-134	209-188
Total Points	284	397
Winners	51	97
%Winners	34%	46%

Both Hsin Tseng and Sakamoto played 2 matches. Both players lost a set in the event. Chun Hsin Tseng lost 1 set, while Rei Sakamoto conceded 2 sets. Hsin Tseng has played 1 set(s) less than Sakamoto (5 vs 6). Therefore, Hsin Tseng played 19 games less than Sakamoto. The Chinese scored 51 winners (34% of the total points). On the other side, Sakamoto blasted 97 winners (46%).

Serve Performance

Serve	Hsin Tseng	Sakamoto
Aces	10	23
Avg per match	5	11.5
1st in	78/134	122/196
%1st in	58%	62%
1st pts	51/78	97/122
%1st pts	65%	80%
2nd pts	31/56	35/74
%2nd pts	55%	47%

Hsin Tseng scored 10 aces (5 per match). Sakamoto blasted 23 aces (11.5 per match). Hsin Tseng won 65% points on his first serve. He pretty solid on his second serve to win 55% of the points. On the other side, Sakamoto won 80% of the points behind his first serve. He had a solid display on his second serve to win 47% of the points.

How they played the important points

Breaks	Hsin Tseng	Sakamoto
Won	10	7
Converted	10/28	7/15
% Converted	36%	47%
Conceded	10	22
Saved	5	18
% Saved	50%	82%
Times Broken	5	4

Hsin Tseng broke his opponents 10 times with a 36% conversion rate. Chun conceded his serve 5 times and he saved 50% of the break points that he conceded. Rei broke his opponents 7 times with a 47% conversion rate. Sakamoto conceded his serve 4 times and he saved 82% of the break points that he conceded.

Hsin Tseng
	R1 Kuzmanov	R2 Chung	Total
Score	6-4 6-1	1-6 6-2 7-5
Tot Set	2	3	5
Tot Games	17	27	44
pts	60-43	90-91	150-134
Total points	103	181	284
Winners	21	30	51
%Winners	35%	33%	34%
SERVE
Aces	8	2	10
Double Faults	0	1	1
1st in	26/46	52/88	78/134
% 1st in	57%	59%	58%
1st pts	21/26	30/52	51/78
% 1st pts	81%	58%	65%
2nd pts	13/20	18/36	31/56
% 2nd pts	65%	50%	55%
Breaks
Won	4	6	10
Converted	4/10	6/18	10/28
Converted %	40%	33%	36%
Conceded	2	8	10
Saved	2/2	3/8	5
Saved %	100%	38%	69%
Times Broken	0	5	5

Sakamoto
	R1 Basing	R2 Barton	Total
Score	7-66 6-74 6-3	3-6 6-3 6-4
Tot Set	3	3	6
Tot Games	35	28	63
pts	114-98	95-90	209-188
Total points	212	185	397
Winners	49	48	97
%Winners	43%	51%	46%
SERVE
Aces	15	8	23
Double Faults	3	4	7
1st in	60/102	62/94	122/196
% 1st in	59%	66%	62%
1st pts	49/60	48/62	97/122
% 1st pts	82%	77%	80%
2nd pts	22/42	13/32	35/74
% 2nd pts	52%	41%	47%
Breaks
Won	4	3	7
Converted	4/7	3/8	7/15
Converted %	57%	38%	47%
Conceded	9	13	22
Saved	7/9	11/13	18
Saved %	78%	85%	82%
Times Broken	2	2	4

Upcoming matches in the draw

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• Elias YmerYmer – Marc-Andrea HueslerHuesler (1-0) – H2H and prediction
• Yosuke WatanukiWatanuki – Hugo GrenierGrenier (0-0) – H2H and prediction
• Chun Hsin TsengHsin Tseng – (0-0) – H2H and prediction