MATCH
| 28.06.17 | 1st round | Seongchan Hong | Dong-Hak Sin | 7-5, 6-3 |  Korea F5 | Clay |
MATCH STATS
| 1st SERVE % | 33/53 (62%) | 53/72 (74%) |
| 1st SERVE POINTS WON | 28/33 (85%) | 33/53 (62%) |
| 2nd SERVE POINTS WON | 13/20 (65%) | 9/19 (47%) |
| BREAK POINTS WON | 3/10 (30%) | 1/1 (100%) |
| TOTAL RETURN POINTS WON | 30/72 (42%) | 12/53 (23%) |
| TOTAL POINTS WON | 71/125 (57%) | 54/125 (43%) |
| DOUBLE FAULTS | 1 | 0 |
| ACES | 3 | 0 |
MATCH STATS
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
26.02.92, 33 years
26.02.92, 33 years
Seongchan Hong vs. Dong-Hak Sin - head to head matches
| 28.06.17 | 1st round | Seongchan Hong | Dong-Hak Sin | 7-5, 6-3 | match details | Korea F5 | Clay |
Seongchan Hong form & Dong-Hak Sin form
Seongchan Hong - last matches
 Shanghai - Hard | ||||
| 01.10.24 qual. | vs. Yosuke Watanuki | 2-6, 5-7 |  | match details |
| 30.09.24 q 1 | vs. Illya Marchenko | 7-65, 6-4 |  | match details |
| Chengdu - Hard | ||||
| 17.09.24 q 1 | vs. Alibek Kachmazov | 4-6, 1-6 | | match details |
 Davis Cup - I. hard | ||||
| 13.09.24 Rubber 1 | vs. Maks Kasnikowski | 7-68, 6-2 | | match details |
| Shanghai Challenger - Hard | ||||
| 04.09.24 2nd round | vs. Dalibor Svrcina | 5-7, 3-6 | | match details |
| 03.09.24 1st round | vs. Tung-Lin Wu | 6-72, 6-4, 6-4 | | match details |
 New York - Hard | ||||
| 21.08.24 q 2 | vs. Kyrian Jacquet | 6-4, 3-6, 5-7 | | match details |
| 19.08.24 q 1 | vs. Jozef Kovalik | 6-4, 6-76, 7-5 | | match details |
| Zhangjiagang Challenger - Hard | ||||
| 31.08.24 1/2 | vs. Yasutaka Uchiyama | 3-6, 7-66, 0-4, - Seongchan Hong - retired | | match details |
| 30.08.24 1/4 | vs. Fajing Sun | 5-7, 6-2, 6-2 | | match details |
| 29.08.24 2nd round | vs. Yan Bai | 6-2, 6-1 | | match details |
| 27.08.24 1st round | vs. Evgeny Donskoy | 4-6, 7-61, 6-2 | | match details |
| Cary Challenger - Hard | ||||
| 12.08.24 1st round | vs. Mattia Bellucci | 4-6, 2-6 | | match details |
| 11.08.24 qual. | vs. Valentin Royer | 6-4, 7-68 | | match details |
| 10.08.24 q 1 | vs. Alex Bolt | 6-1, 6-1 | | match details |
| Washington - Hard | ||||
| 01.08.24 3rd round | vs. Alex Michelsen | 3-6, 3-6 | | match details |
| 31.07.24 2nd round | vs. Karen Khachanov | 6-2, 6-4 | | match details |
| 29.07.24 1st round | vs. Adam Walton | 7-66, 7-64 | | match details |
| 28.07.24 qual. | vs. Paul Jubb | 6-4, 7-5 | | match details |
| 27.07.24 q 1 | vs. Alex Bolt | 6-4, 6-4 | | match details |
| Chicago Challenger - Hard | ||||
| 26.07.24 1/4 | vs. Learner Tien | 3-6, 1-6 | | match details |
| 24.07.24 2nd round | vs. Charles Broom | 6-3, 6-74, 6-4 | | match details |
| 22.07.24 1st round | vs. Alex Bolt | 6-4, 6-3 | | match details |
| Newport - Grass | ||||
| 14.07.24 q 1 | vs. Alex Bolt | 4-6, 3-6 | | match details |
 Winnipeg Challenger - Hard | ||||
| 08.07.24 1st round | vs. Yuta Shimizu | 2-6, 5-7 | | match details |
 London - Grass | ||||
| 24.06.24 q 1 | vs. Pierre-Hugues Herbert | 3-6, 2-6 | | match details |
| Tyler Challenger - Hard | ||||
| 07.06.24 1/4 | vs. Liam Draxl | 2-6, 2-6 | | match details |
| 06.06.24 2nd round | vs. Ernesto Escobedo | 3-6, 6-4, 6-2 | | match details |
| 04.06.24 1st round | vs. Andres Andrade | 6-2, 2-6, 7-61 | | match details |
 Paris - Clay | ||||
| 20.05.24 q 1 | vs. Enzo Couacaud | 7-67, 2-6, 1-6 | | match details |
Dong-Hak Sin - last matches
| Korea F6 - Clay | ||||
| 30.08.18 2nd round | vs. Min-Kyu Song | 7-65, 2-6, 4-6 | | match details |
| 28.08.18 1st round | vs. Geun Jun Kim | 6-2, 6-3 | | match details |
| Korea F5 - Hard | ||||
| 18.08.18 q 1 | vs. Sung Hun Kim | 5-7, 1-6 | | match details |
| Gwangju Challenger - Hard | ||||
| 14.08.18 1st round | vs. Maverick Banes | 2-6, 1-6 | | match details |
| Korea F2 - Hard | ||||
| 10.06.18 q 2 | vs. Jin Sung Han | 6-72, 6-4, 6-74 | | match details |
| Korea F1 - Hard | ||||
| 06.06.18 2nd round | vs. Cheong-Eui Kim | 1-6, 2-6 | | match details |
| 05.06.18 1st round | vs. Ju-Hae Moon | 6-1, 6-4 | | match details |
| 03.06.18 q 2 | vs. Woo Hyeok Jang | 6-1, 6-2 | | match details |
| 03.06.18 qual. | vs. Jun Sang Park | 6-2, 6-3 | | match details |
| Gwangju Challenger - Hard | ||||
| 19.09.17 1st round | vs. Matthew Ebden | 5-7, 3-6 | | match details |
| Korea F5 - Clay | ||||
| 28.06.17 1st round | vs. Seongchan Hong | 5-7, 3-6 | | match details |
| 26.06.17 qual. | vs. Woo-Ram Kim | 6-2, 3-6, 7-5 | | match details |
| 26.06.17 q 1 | vs. Wonseok Lee | 6-1, 6-1 | | match details |
| 26.06.17 q 2 | vs. Geon Ju Shin | 7-5, 6-3 | | match details |
| Korea F4 - Hard | ||||
| 20.06.17 1st round | vs. Min-Hyoek Cho | 4-6, 0-6 | | match details |
| 19.06.17 qual. | vs. Byeonghun Kim | 6-3, 6-1 | | match details |
| 19.06.17 q 2 | vs. Jun Su Kim | 6-3, 6-3 | | match details |
| Korea F3 - Hard | ||||
| 12.06.17 q 1 | vs. Young-Hoon Jeong | 2-6, 1-6 | | match details |
| Korea F2 - Hard | ||||
| 09.06.17 1/4 | vs. Cheong-Eui Kim | 4-6, 3-6 | | match details |
| 08.06.17 2nd round | vs. Dylan Seong-Kwan Kim | 6-4, 6-76, 7-5 | | match details |
| 07.06.17 1st round | vs. Jui-Chen Hung | 2-6, 6-4, 7-5 | | match details |
| 05.06.17 qual. | vs. Jun Sang Park | 7-5, 2-6, 6-0 | | match details |
| 05.06.17 q 1 | vs. Jung Nyeon Kim | 6-3, 6-4 | | match details |
| 05.06.17 q 2 | vs. Ivan Kalinin | 6-2, 6-2 | | match details |
| Korea F1 - Hard | ||||
| 01.06.17 2nd round | vs. Cheong-Eui Kim | 3-6, 5-7 | | match details |
| 31.05.17 1st round | vs. Sung Jun Park | 4-6, 6-2, 6-3 | | match details |
| 29.05.17 qual. | vs. Seongbin Sim | 6-3, 6-0 | | match details |
| 29.05.17 q 1 | vs. Hyeong Jin Cho | 6-3, 6-4 | | match details |
| 29.05.17 q 2 | vs. Dukyoung Kim | 3-6, 6-3, 6-1 | | match details |
| Korea F8 - Clay | ||||
| 05.09.16 q 1 | vs. Jae-Won Choi | 6-4, 7-5 | | match details |
