H2H, prediction of Rei Sakamoto vs Zhizhen Zhang in Seoul Challenger with odds, preview, pick | 28th October 2026

PREVIEW. Seoul Challenger. Sakamoto and Zhang will fight against each other in the 2nd round of the Seoul Challenger. See the prediction, H2H stats, odds, and preview of their upcoming match on Wednesday the 28th of October

By
Mark Hall
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Prediction and head to head Rei Sakamoto vs. Zhizhen Zhang

Rei Sakamoto and Zhizhen Zhang will face off in the 2nd round of the Seoul Challenger for the 2nd time in their career. They are scheduled to compete on Wednesday at 4:00 pm on Centre Court. 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 2 sets.

As per the initial odds, Rei Sakamoto is the pick to win this match.
Rei Sakamoto -> 1.285
Zhizhen Zhang -> 3.24

 

 

Here where top tennis events are broadcasted or streamed online (ATP, WTA).

At the challenger level, there will be free live streaming on Challenger TV.

 

Sure Win Arbitrage

Prediction and head to head Rei Sakamoto vs. Zhizhen Zhang

This will be the 2nd time that Rei Sakamoto and Zhizhen Zhang square off. The head to head is 1-0 for Zhang (see full H2H stats), 1-0 on hard.

The last time that they played each other, Zhang won 6-1 6-4 in the semifinal in the Brisbane 2 Challenger back in February 2026.

Rei Sakamoto

Rei Sakamoto
Rei Sakamoto

42 - 25win/loss

Hard
28-16
I Hard
3-1
Clay
9-6
Grass
2-2
Rank
125
High
124
WLWWLWWWWL
See allSTATS
Year Total Hard Clay I.hard Grass Carpet
2026 42-25 28-16 9-6 3-1 2-2 0-0
2025 34-26 27-16 3-3 4-7 0-0 0-0
2024 20-16 12-11 6-3 2-2 0-0 0-0
2023 7-11 1-4 5-5 1-2 0-0 0-0
2022 5-6 5-3 0-3 0-0 0-0 0-0
See all years

Ranked no. 125, Sakamoto got to the 2nd round after defeating Kasidit Samrej 6-3 6-4.

In the 1st round, The Japanese had a good straight sets win against Samrej (6-3 6-4). During the match, Sakamoto scored 66 points vs Samrej’s 43. Sakamoto was exceptionally aggressive to blast 30 winners.

Talking about the service games, Sakamoto scored 8 aces and he committed only 1 double fault. Rei Sakamoto was exceptionally effective on serve to win 77% (30/39) of his 1st serve and 88% (15/17) on the second serve. This was the main reason for not conceding a single break during the match. Rei broke Samrej twice after converting 40% of his break points (2/5).

Sakamoto has a winning match record in the last 5 years having won 56% of his matches (108-84). 28-16 on hard in 2026. Talking about his performance on the same surface of this competition, Sakamoto has an overall73-50 win-loss record in the last 5 years on hard.

Rei has an overall 42-25 win-loss record in 2026, 28-16 on hard (See FULL STATS).

Previously in the Seoul Challenger

The Japanese has never competed in this tournament before.

Sakamoto
Seoul Challenger
Sakamoto's Record

Zhizhen Zhang

Zhizhen Zhang
Zhizhen Zhang

23 - 25win/loss

Hard
10-14
I Hard
1-0
Clay
3-7
Grass
9-4
Rank
166
High
31
WLWLLLLLWL
See allSTATS
Year Total Hard Clay I.hard Grass Carpet
2026 23-25 10-14 3-7 1-0 9-4 0-0
2025 4-12 2-10 0-0 2-2 0-0 0-0
2024 24-28 9-12 9-7 2-5 4-4 0-0
2023 30-29 12-13 15-10 1-2 2-4 0-0
2022 52-28 11-5 31-11 9-11 1-1 0-0
See all years

Ranked no. 166, the Chinese reached the 2nd round after defeating Marin Cilic 7-6(3) 2-6 6-3.

In the 1st round, Zhang defeated Cilic (7-63 2-6 6-3). During the match Zhang and Cilic scored the same amount of points (91). However, the world no. 125 was stronger during the important points and that was the most significant difference in the match. Zhang was quite aggressive to blast 50 winners.

Talking about serving, Zhang submerged his opponent with 21 aces and he committed only 6 double faults. Zhizhen Zhang lost the serve twice and he saved 1 break points. Furthermore, Zhang put 71% of his first serves in, winning 77% (50/65) of the points behind his 1st serve and 50% (13/26) on the 2nd serve. Zhizhen broke Cilic once after converting 20% of his break points (1/5).

His best result of the year was winning the title the Brisbane 2 Challenger where he overcame Alex Bolt in the final 6-2 6-4.

Zhizhen has a composed 23-25 win-loss record in 2026, 10-14 on hard (See FULL STATS).

Zhang
Seoul Challenger
Zhang's Record
Soccer Tonic Predictions

H2H Performance in the tournament

R.Sakamoto
Z.Zhang
1h:20
1h:20
Time on court​
1h:58
1h:58
1h:20
1h:20
Last match​
1h:58
1h:58
1
1
Match played
1
1
19
19
Games Played​
30
30
2
2
Set played​​
3
3
66
66
Total points​
91
91
66
66
Avg point​
91
91
30
30
Winners
50
50
30
30
Avg Winners​
50
50
45%
45%
Ratio winners
55%
55%
-- Serve --
8
8
Aces
21
21
8
8
Avg Aces
!
21
21
1
1
Double Faults
6
6
1
1
Avg Double Faults
!
6
6
30/39
30/39
1st won total​
50/65
50/65
!
77%
77%
1st won %
!
77%
77%
15/17
15/17
2nd won total​
13/26
13/26
!
88%
88%
2nd won %
50%
50%
-- Break Points --
2/5
2/5
BP won
1/5
1/5
2/5
2/5
Avg BP won
1/5
1/5
40%
40%
Won
!
20%
20%
2
2
Conceded
3
3
2
2
Avg Conceded
3
3
0
0
Broken
2
2
!
0
0
Avg Broken
2
2
2
2
Saved
1
1
See Allstats

Matches, sets, games and points

Points Sakamoto Zhang
Match played 1 1
Tot Set 2 3
Tot Games 19 30
Pts 66-43 91-91
Total Points 109 182
Winners 30 50
%Winners 45% 55%

Both Sakamoto and Zhang played 1 match. At the moment, Zhizhen Zhang lost 1 set while Rei Sakamoto hasn’t surrendered a set so far. Sakamoto has played 1 set(s) less than Zhang (2 vs 3). Therefore, Sakamoto played 11 games less than Zhang. Sakamoto scored 30 winners (45% of the total points). On the other side, The Chinese managed to score 50 winners (55%).

Serve Performance

Serve Sakamoto Zhang
Aces 8 21
Avg per match 8 21
1st in 39/56 65/91
%1st in 70% 71%
1st pts 30/39 50/65
%1st pts 77% 77%
2nd pts 15/17 13/26
%2nd pts 88% 50%

Sakamoto scored 8 aces . Zhang managed to score 21 aces . Sakamoto won 77% points on his first serve. He pretty effective on his second serve to win 88% of the points. On the other side, Zhang won 77% of the points on his first serve. He had a solid display on his second serve to win 50% of the points.

How they played the important points

Breaks Sakamoto Zhang
Won 2 1
Converted 2/5 1/5
% Converted 40% 20%
Conceded 2 3
Saved 2 1
% Saved 100% 33%
Times Broken 0 2

Rei broke his opponent twice with a 40% conversion rate. Sakamoto had a solid display on his serve as he has never surrendered a single service game after saving 2 break points. Zhang broke his opponent once with a 20% conversion rate. Zhang conceded his serve twice and he saved 33% of the break points that he conceded.

Sakamoto
R1
Samrej		 Total
Score 6-3 6-4
Tot Set 2 2
Tot Games 19 19
pts 66-43 66-43
Total points 109 109
Winners 30 30
%Winners 45% 45%
SERVE
Aces 8 8
Double Faults 1 1
1st in 39/56 39/56
% 1st in 70% 70%
1st pts 30/39 30/39
% 1st pts 77% 77%
2nd pts 15/17 15/17
% 2nd pts 88% 88%
Breaks
Won 2 2
Converted 2/5 2/5
Converted % 40% 40%
Conceded 2 2
Saved 2/2 2
Saved % 100% 100%
Times Broken 0 0
Zhang
R1
Cilic		 Total
Score 7-63 2-6 6-3
Tot Set 3 3
Tot Games 30 30
pts 91-91 91-91
Total points 182 182
Winners 50 50
%Winners 55% 55%
SERVE
Aces 21 21
Double Faults 6 6
1st in 65/91 65/91
% 1st in 71% 71%
1st pts 50/65 50/65
% 1st pts 77% 77%
2nd pts 13/26 13/26
% 2nd pts 50% 50%
Breaks
Won 1 1
Converted 1/5 1/5
Converted % 20% 20%
Conceded 3 3
Saved 1/3 1
Saved % 33% 33%
Times Broken 2 2

Head 2 Head

Rei Sakamoto
  • 0Slam
  • 0Main
  • 3Chall
  • 0Minor
Zhizhen Zhang
  • 0Slam
  • 0Main
  • 4Chall
  • 2Minor

Rei
Sakamoto

0:1

Zhizhen
Zhang

Rank

125

High

124

1h:20Played

0Hard1

Rank

166

High

31

1h:58Played
Win Loss
Sakamoto
WWWWWWWWWW
Zhang
WWWWWWWWWW
2026 2025 2024
41 - 25
22 - 25
28-16
Hard
10-14
2-1
I Hard
0-0
9-6
Clay
3-7
2-2
Grass
9-4

Tennis Scores in Seoul Challenger

See Updated Draw
Soccer Tonic Predictions
Sure Win Arbitrage

Upcoming matches in the draw

Sakamoto Rei Sakamoto
More Stats
Click here
Zhang Zhizhen Zhang