Yuki Mochizuki and Yunseong Chung will square off in the qualifications of the Seoul Challenger for the 2nd time in their career. They are scheduled to compete on Monday at 11:00 am on COURT 13. In this post, we analyze their head to head performance and prediction.
Prediction, odds and live streaming
The pick for Tennis Tonic is Yuki Mochizuki who should win in 3 sets.
Yuki Mochizuki -> 1.87
Yunseong Chung -> 1.87
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Prediction and head to head Yuki Mochizuki vs. Yunseong Chung
This will be the 2nd time that Yuki Mochizuki and Yunseong Chung square off. The head to head is 1-0 for Mochizuki (see full H2H stats), 1-0 on hard.
The last time that they played, Mochizuki won 7-6(8) 6-4 in the 2nd round in M25 Taipei back in August 2025.
Yuki Mochizuki
28 - 19win/loss
534
471
| Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 31-22 | 25-15 | 6-6 | 0-1 | 0-0 | 0-0 |
| 2024 | 24-24 | 19-20 | 4-2 | 1-2 | 0-0 | 0-0 |
| 2023 | 30-26 | 21-23 | 9-3 | 0-0 | 0-0 | 0-0 |
| 2022 | 33-20 | 18-12 | 14-7 | 1-1 | 0-0 | 0-0 |
| 2021 | 15-8 | 15-8 | 0-0 | 0-0 | 0-0 | 0-0 |
Ranked no. 494, the Japanese got to the qualifications after beating Alexander Bravo 6-2 6-2.
In the qualifications, Yuki had a good straight sets win against Bravo (6-2 6-2). During the match, Mochizuki scored 72 points vs Bravo’s 45. Yuki was quite aggressive to blast 24 winners.
Regarding the service games, Mochizuki fired 2 aces and he committed only 2 double faults. Yuki Mochizuki was extremely effective on serve to win 80% (24/30) of his 1st serve and 68% (13/19) on the second serve. This was the main reason for not conceding a single break during the match. The Japanese broke Bravo 4 times after converting 36% of his break points (4/11).
Mochizuki has a solid win-loss record in the last 10 years having won 60% of his matches (191-128). 22-13 on hard in 2025. In connection with his performance on the same surface of this competition, Mochizuki has an aggregate 139-97 win-loss record in the last years on hard.
Yuki’s best result of the season was getting to the final in M15 Osaka and M25 Taipei.
Yuki has an overall 28-19 win-loss record in 2025, 22-13 on hard (See FULL STATS).
Previously in the Seoul Challenger
Yunseong Chung
| Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 13-8 | 13-8 | 0-0 | 0-0 | 0-0 | 0-0 |
| 2024 | 14-17 | 14-17 | 0-0 | 0-0 | 0-0 | 0-0 |
| 2023 | 30-22 | 20-16 | 5-4 | 3-1 | 2-1 | 0-0 |
| 2022 | 34-25 | 23-17 | 7-4 | 4-4 | 0-0 | 0-0 |
| 2021 | 28-15 | 21-10 | 5-4 | 2-1 | 0-0 | 0-0 |
Ranked no. 894, Chung got to the qualifications after defeating Kaichi Uchida 4-6 6-3 6-4.
In the qualifications against Uchida, Chung recovered from a 1-set down deficit before winning (4-6 6-3 6-4). During the match Chung scored 93 points vs Uchida’s 81. Yunseong was quite aggressive to blast 36 winners.
Talking about serving, Chung scored 7 aces and he committed only 1 double fault for the entire match. Overall, Yunseong Chung was very efficient on serve to win 73% (36/49) of his 1st serve and 58% (21/36) on the second serve. However, this didn’t prevent his to concede the serve 3 times. Chung broke Uchida 4 times after converting 40% of his break points (4/10).
Chung’s best result of the current season was reaching the semifinal in M25 Changwon.
Yunseong has an aggregate 13-7 win-loss record in 2025, 13-7 on hard (See FULL STATS).
Previously in the Seoul Challenger
Previously, his best result was reaching the semifinal in 2023. See his history.
H2H Performance in the tournament
Matches, sets, games and points
| Points | Mochizuki | Chung |
|---|---|---|
| Match played | 1 | 1 |
| Tot Set | 2 | 3 |
| Tot Games | 16 | 29 |
| Pts | 72-45 | 93-81 |
| Total Points | 117 | 174 |
| Winners | 24 | 36 |
| %Winners | 33% | 39% |
Both Mochizuki and Chung played 1 match. Also both players started their run from the qualifications.At the moment, Yunseong Chung dropped 1 set while Yuki Mochizuki hasn’t dropped a set so far. Mochizuki has played 1 set(s) less than Chung (2 vs 3). Therefore, Mochizuki played 13 games less than Chung. Yuki scored 24 winners (33% of the total points). On the other side, Yunseong managed to score 36 winners (39%).
Serve Performance
| Serve | Mochizuki | Chung |
|---|---|---|
| Aces | 2 | 7 |
| Avg per match | 2 | 7 |
| 1st in | 30/49 | 49/85 |
| %1st in | 61% | 58% |
| 1st pts | 24/30 | 36/49 |
| %1st pts | 80% | 73% |
| 2nd pts | 13/19 | 21/36 |
| %2nd pts | 68% | 58% |
Mochizuki scored 2 aces . Chung recorded 7 aces . Mochizuki won 80% points behind his first serve. He pretty solid on his second serve to win 68% of the points. On the other side, Chung won 73% of the points on his first serve. He had a solid display on his second serve to win 58% of the points.
How they played the important points
| Breaks | Mochizuki | Chung |
|---|---|---|
| Won | 4 | 4 |
| Converted | 4/11 | 4/10 |
| % Converted | 36% | 40% |
| Conceded | 3 | 7 |
| Saved | 3 | 4 |
| % Saved | 100% | 57% |
| Times Broken | 0 | 3 |
Mochizuki broke his opponent 4 times with a 36% conversion rate. The Japanese pretty solid on his serve as he has never surrendered a single service game after saving 3 break points. The Korean broke his opponent 4 times with a 40% conversion rate. Yunseong conceded his serve 3 times and he saved 57% of the break points that he conceded.
| Mochizuki | |||
| Q1 Bravo | Total | ||
|---|---|---|---|
| Score | 6-2 6-2 | ||
| Tot Set | 2 | 2 | |
| Tot Games | 16 | 16 | |
| pts | 72-45 | 72-45 | |
| Total points | 117 | 117 | |
| Winners | 24 | 24 | |
| %Winners | 33% | 33% | |
| SERVE | |||
| Aces | 2 | 2 | |
| Double Faults | 2 | 2 | |
| 1st in | 30/49 | 30/49 | |
| % 1st in | 61% | 61% | |
| 1st pts | 24/30 | 24/30 | |
| % 1st pts | 80% | 80% | |
| 2nd pts | 13/19 | 13/19 | |
| % 2nd pts | 68% | 68% | |
| Breaks | |||
| Won | 4 | 4 | |
| Converted | 4/11 | 4/11 | |
| Converted % | 36% | 36% | |
| Conceded | 3 | 3 | |
| Saved | 3/3 | 3 | |
| Saved % | 100% | 100% | |
| Times Broken | 0 | 0 | |
| Chung | |||
| Q1 Uchida | Total | ||
|---|---|---|---|
| Score | 4-6 6-3 6-4 | ||
| Tot Set | 3 | 3 | |
| Tot Games | 29 | 29 | |
| pts | 93-81 | 93-81 | |
| Total points | 174 | 174 | |
| Winners | 36 | 36 | |
| %Winners | 39% | 39% | |
| SERVE | |||
| Aces | 7 | 7 | |
| Double Faults | 1 | 1 | |
| 1st in | 49/85 | 49/85 | |
| % 1st in | 58% | 58% | |
| 1st pts | 36/49 | 36/49 | |
| % 1st pts | 73% | 73% | |
| 2nd pts | 21/36 | 21/36 | |
| % 2nd pts | 58% | 58% | |
| Breaks | |||
| Won | 4 | 4 | |
| Converted | 4/10 | 4/10 | |
| Converted % | 40% | 40% | |
| Conceded | 7 | 7 | |
| Saved | 4/7 | 4 | |
| Saved % | 57% | 57% | |
| Times Broken | 3 | 3 | |
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- Frederico Ferreira SilvaFerreira Silva – Garrett JohnsJohns (0-0) – H2H and prediction
- Taro DanielDaniel – Yasutaka UchiyamaUchiyama (2-0) – H2H and prediction
- Omar JasikaJasika – Sho ShimabukuroShimabukuro (0-0) – H2H and prediction
- Yunseong ChungChung – Yuki MochizukiMochizuki (0-1) – H2H and prediction
- Renta TokudaTokuda – Elias YmerYmer (0-1) – H2H and prediction
- Yusuke TakahashiTakahashi – (0-1) – H2H and prediction
- Masamichi ImamuraImamura – Michael VrbenskyVrbensky (0-0) – H2H and prediction
- Sanhui ShinShin – (0-0) – H2H and prediction
- Duje AjdukovicAjdukovic – Yu Hsiou HsuHsiou Hsu (0-0) – H2H and prediction
- Oliver CrawfordCrawford – (0-1) – H2H and prediction
- Kasidit SamrejSamrej – Takuya KumasakaKumasaka (4-0) – H2H and prediction
- Woobin ShinShin – Marc-Andrea HueslerHuesler (0-0) – H2H and prediction