Japan
21.09.88, 36 years
21.09.88, 36 years
Country
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Birthdate
Height
Weight
Profi since
Play
Ranking's position
Points
Prize money
Republic of Korea
18.01.97, 28 years
18.01.97, 28 years
Koichi Sano vs. Yong Seak Jang - H2H matches
| 31.08.15 | q 2 | Koichi Sano | Yong Seak Jang | 6-3, 6-2 | match details |  Korea F6 | Clay |
Koichi Sano form & Yong Seak Jang form
Koichi Sano - last matches
 Japan F6 - Hard | ||||
| 10.04.18 1st round | vs. Chuhan Wang | 4-6, 3-6 |  | match details |
| Japan F8 - Carpet | ||||
| 16.06.17 1/4 | vs. Sora Fukuda | 3-6, 1-6 | | match details |
| 15.06.17 2nd round | vs. Arata Onozawa | 2-6, 6-1, 6-0 |  | match details |
| 14.06.17 1st round | vs. Akito Higa | 6-3, 6-4 | | match details |
| Japan F5 - Hard | ||||
| 03.04.17 1st round | vs. Yuki Matsuo | 5-7, 6-712 | | match details |
| 03.04.17 qual. | vs. Rimpei Kawakami | 6-1, 6-2 | | match details |
| 03.04.17 q 1 | vs. Artem Vu | 6-2, 6-4 | | match details |
| Japan F4 - Hard | ||||
| 27.03.17 q 1 | vs. Yohei Ono | 3-6, 1-6 | | match details |
| Japan F3 - Hard | ||||
| 20.03.17 q 1 | vs. Yuki Matsuo | 4-6, 6-77 | | match details |
| Japan F2 - Hard | ||||
| 14.03.17 1st round | vs. Gengo Kikuchi | 2-6, 4-6 | | match details |
| 13.03.17 q 2 | vs. Kaito Itsusaki | 7-64, 6-1 | | match details |
| 13.03.17 qual. | vs. Collin Johns | 7-5, 4-6, 6-4 | | match details |
| Japan F1 - Hard | ||||
| 06.03.17 q 2 | vs. Yuga Tashiro | 2-6, 4-6 | | match details |
| 06.03.17 q 1 | vs. Kazuya Tamura | 6-3, 6-3 | | match details |
 Vietnam F5 - Hard | ||||
| 19.09.16 q 2 | vs. Shinta Fujii | 4-6, 3-6 | | match details |
| Vietnam F4 - Hard | ||||
| 11.09.16 1st round | vs. Arata Onozawa | 6-2, 6-79, 0-6 | | match details |
 China F13 - Clay | ||||
| 20.07.16 2nd round | vs. Issei Okamura | 0-6, 2-6 | | match details |
| 19.07.16 1st round | vs. Xi Qi | 6-2, 7-61 | | match details |
| China F12 - Clay | ||||
| 13.07.16 2nd round | vs. Soichiro Moritani | 7-65, 4-6, 1-6 | | match details |
| 12.07.16 1st round | vs. Zihao Xia | 7-63, 6-3 | | match details |
| Japan F8 - Carpet | ||||
| 13.06.16 q 1 | vs. Yuga Tashiro | 6-3, 7-5 | | match details |
| 13.06.16 qual. | vs. Kaito Uesugi | 2-6, 4-6 | | match details |
| 13.06.16 q 2 | vs. Yuhei Kono | 6-4, 6-1 | | match details |
| Japan F7 - Hard | ||||
| 08.06.16 2nd round | vs. Sho Katayama | 6-3, 2-6, 1-6 | | match details |
| 07.06.16 1st round | vs. Evan Song | 2-6, 7-5, 6-4 | | match details |
| 06.06.16 qual. | vs. Masaki Sasai | 6-3, 7-5 | | match details |
| 06.06.16 q 1 | vs. Genki Hosoya | 6-4, 6-1 | | match details |
 Guam F1 - Hard | ||||
| 24.05.16 2nd round | vs. Andrew Whittington | 4-6, 2-6 | | match details |
| 22.05.16 1st round | vs. Winter Meagher | 6-1, 6-2 | | match details |
| 23.05.16 qual. | vs. Yusuke Yoshikawa | 7-63, 6-3 | | match details |
Yong Seak Jang - last matches
| Korea F2 - Hard | ||||
| 05.06.17 q 1 | vs. Seunghun Shin | 2-6, 2-6 | | match details |
| Korea F6 - Clay | ||||
| 31.08.15 q 2 | vs. Koichi Sano | 3-6, 2-6 | | match details |
| 31.08.15 q 1 | vs. Donghwi Shin | 6-3, 6-2 | | match details |
| Korea F12 - Clay | ||||
| 25.08.14 q 1 | vs. Seong-Woon Yu | 2-6, 2-6 | | match details |
