Yosuke Watanuki and Kokoro Isomura will fight against each other in the 1st round of the Seoul Challenger for the 2nd time in their career. They are scheduled to compete on Tuesday at 11:00 am on COURT 2. Here the head to head stats and relative prediction.
Prediction, odds and live streaming
The pick for Tennis Tonic is Yosuke Watanuki who should win in 2 sets.
Yosuke Watanuki -> 1.191
Kokoro Isomura -> 4.3
Click here to see the updated quotes and live streaming (only selected countries - USA excluded).
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.
Prediction and head to head Yosuke Watanuki vs. Kokoro Isomura
This will be the 2nd time that Yosuke Watanuki and Kokoro Isomura play each other. The head to head is 1-0 for Watanuki (see full H2H stats), 1-0 on hard.
The last time that they locked horns, Watanuki won 6-0 7-5 in the quarter in the Matsuyama Challenger back in 2024.
Yosuke Watanuki
26 - 23win/loss
159
72
| Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 31-24 | 18-18 | 0-0 | 6-1 | 7-5 | 0-0 |
| 2024 | 11-11 | 9-8 | 0-1 | 2-2 | 0-0 | 0-0 |
| 2023 | 43-23 | 29-12 | 7-5 | 1-2 | 6-4 | 0-0 |
| 2022 | 40-22 | 19-11 | 6-4 | 15-7 | 0-0 | 0-0 |
| 2021 | 18-17 | 8-9 | 2-3 | 6-4 | 2-1 | 0-0 |
Ranked no. 168, Watanuki will start his run in the Seoul Challenger after he played his last match in the Jinan Challenger where he lost 1-6 6-3 6-2 to Harris in the 1st round on the 7th of October.
Yousuke has a composed 26-23 win-loss record in 2025, 18-17 on hard (See FULL STATS).
The Japanese’s best result of the year was reaching the semifinal in the Gwangju Challenger.
Talking about his overall career, Yousuke has an overall 256-170 record. He has a positive 159-98 record on hard.
Previously in the Seoul Challenger
Previously, his best result was reaching the 2nd round in 2018. See his history.
Kokoro Isomura
| Year | Total | Hard | Clay | I.hard | Grass | Carpet |
|---|---|---|---|---|---|---|
| 2025 | 34-29 | 32-27 | 0-0 | 2-2 | 0-0 | 0-0 |
| 2024 | 39-25 | 27-18 | 6-4 | 6-3 | 0-0 | 0-0 |
| 2023 | 25-30 | 25-29 | 0-1 | 0-0 | 0-0 | 0-0 |
| 2022 | 24-16 | 7-9 | 17-7 | 0-0 | 0-0 | 0-0 |
| 2021 | 6-8 | 4-2 | 2-6 | 0-0 | 0-0 | 0-0 |
Ranked no. 515, Isomura reached the 1st round after beating Dong Ju Kim 6-4 6-3 and Yusuke Takahashi 6-2 6-4.
In the qualifications, Kokoro had a good straight sets win against Takahashi (6-2 6-4). During the match Isomura scored 62 points vs Takahashi’s 46. Isomura was pretty aggressive to blast 26 winners.
About the serving games, Isomura scored just 1 ace during the entire match and he committed only 3 double faults. Kokoro Isomura lost the serve twice and he saved 4 break points. Furthermore, Isomura put 66% of his first serves in, winning 74% (26/35) of the points behind his 1st serve and 39% (7/18) on the 2nd serve. Kokoro broke Takahashi 5 times after converting 71% of his break points (5/7).
Overall Performance in this tournament
The Japanese started his run at this tournament from the qualifications. In the main draw, he hasn’t lost yet a set in this tournament to win 56% of the points he played.
The Japanese’s best result of the year was getting to the final in M15 Luan.
Kokoro has a composed 33-26 win-loss record in 2025, 31-25 on hard (See FULL STATS).
Previously in the Seoul Challenger
Previously, his best result was reaching the qualifications in 2024. See his history.
Tennis Scores in Seoul Challenger
- Rio NoguchiNoguchi – James DuckworthDuckworth (1-6 7-5 6-3) – Stats, scores, rankings
- Sho ShimabukuroShimabukuro – Omar JasikaJasika (6-3 5-7 7-64) – Stats, scores, rankings
- Oliver CrawfordCrawford – Henrique RochaRocha (6-1 6-4) – Stats, scores, rankings
- Chak Lam Coleman WongLam Coleman Wong – Hyeon ChungChung (6-3 6-2) – Stats, scores, rankings
Upcoming matches in the draw
- Frederico Ferreira SilvaFerreira Silva – Garrett JohnsJohns (0-0) – H2H and prediction
- Taro DanielDaniel – Yasutaka UchiyamaUchiyama (2-0) – H2H and prediction
- Renta TokudaTokuda – Elias YmerYmer (0-1) – H2H and prediction
- Jurij RodionovRodionov – (0-0) – H2H and prediction
- Uisung ParkPark – Bu YunchaoketeYunchaokete (0-0) – H2H and prediction
- Sanhui ShinShin – (0-0) – H2H and prediction
- Duje AjdukovicAjdukovic – Yu Hsiou HsuHsiou Hsu (0-0) – H2H and prediction
- Yuta ShimizuShimizu – Masamichi ImamuraImamura (3-0) – H2H and prediction
- Rio NoguchiNoguchi – Sho ShimabukuroShimabukuro (3-1) – H2H and prediction
- Kasidit SamrejSamrej – Yuki MochizukiMochizuki (1-2) – H2H and prediction
- Woobin ShinShin – Marc-Andrea HueslerHuesler (0-0) – H2H and prediction