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
16.05.79, 46 years
16.05.79, 46 years
Mark Nielsen vs. Seung-Hoon Oh - head to head matches
| 02.05.05 | 2nd round | Mark Nielsen | Seung-Hoon Oh | 7-5, 7-5 | match details |  Korea F1 | Hard |
Mark Nielsen form & Seung-Hoon Oh form
Mark Nielsen - last matches
 Japan F5 - Carpet | ||||
| 16.06.08 1st round | vs. Fumiaki Kita | 7-5, 6-4 |  | match details |
| 16.06.08 2nd round | vs. Young-Jun Kim | 4-6, 6-74 |  | match details |
| Japan F4 - Clay | ||||
| 09.06.08 2nd round | vs. Yong-Kyu Lim | 6-3, 6-4 | | match details |
| 09.06.08 1/4 | vs. Tatsuma Ito | 6-1, 6-4 | | match details |
| 09.06.08 1/2 | vs. Stephen Bass | 4-6, 7-64, 2-6 | | match details |
| 09.06.08 1st round | vs. Hyung-Tae Kwon | 6-3, 6-4 | | match details |
 Davis Cup - Hard | ||||
| 12.04.08 | vs. Ali Ismaeel | 6-4, 6-2 | | match details |
 New Zealand - Hard | ||||
| 27.02.06 2nd round | vs. Daniel King-Turner | 0-1, - Mark Nielsen - retired | | match details |
| 27.02.06 1st round | vs. Raphael Durek | 6-2, 6-3 | | match details |
 Australia F2 - Hard | ||||
| 20.02.06 2nd round | vs. Daniel King-Turner | 4-6, 6-3, 7-64 | | match details |
| 20.02.06 1/4 | vs. Ti Chen | 6-4, 6-2 | | match details |
| 20.02.06 1st round | vs. Timo Nieminen | 7-62, 6-4 | | match details |
| 20.02.06 1/2 | vs. Satoshi Iwabuchi | 2-6, 5-7 | | match details |
| Davis Cup - I. hard | ||||
| 13.02.06 Rubber 1 | vs. Karim Alayly | 6-2, 6-1, 6-2 | | match details |
| Australia F1 - Hard | ||||
| 13.02.06 1st round | vs. Scott Lipsky | 6-4, 3-6, 4-6 | | match details |
| Melbourne - Hard | ||||
| 12.01.06 q 1 | vs. Lars Burgsmuller | 1-6, 4-6 | | match details |
| Auckland - Hard | ||||
| 09.01.06 1st round | vs. Mario Ancic | 1-6, 2-6 | | match details |
| Caloundra - Hard | ||||
| 01.11.05 1st round | vs. Jan Masik | 4-6, 3-6 | | match details |
| Australia F8 - Hard | ||||
| 10.10.05 1/4 | vs. Alun Jones | 6-1, 7-65 | | match details |
| 10.10.05 1/2 | vs. Ti Chen | 6-0, 6-2 | | match details |
| 10.10.05 1st round | vs. Jose Statham | 6-1, 6-0 | | match details |
| 10.10.05 fin | vs. Robert Smeets | 5-7, 3-6 | | match details |
| 10.10.05 2nd round | vs. Myles Blake | 6-4, 6-1 | | match details |
| Australia F7 - Hard | ||||
| 03.10.05 2nd round | vs. Scott Doerner | 6-73, 4-6 | | match details |
| 03.10.05 1st round | vs. Myles Blake | 6-0, 6-3 | | match details |
| Davis Cup - I. hard | ||||
| 19.09.05 Rubber 1 | vs. Kyu-Tae Im | 0-6, 4-6, 6-4, 6-0, 5-2, Kyu-Tae Im - retired | | match details |
| 19.09.05 | vs. Hyung-Taik Lee | 2-6, 6-78, 3-6 | | match details |
| Japan F10 - Hard | ||||
| 05.09.05 1st round | vs. Hiroyasu Sato | 6-73, 7-5, 6-3 | | match details |
| 05.09.05 2nd round | vs. Dae-Dong Lee | 6-3, 6-0 | | match details |
| 05.09.05 1/2 | vs. David Martin | 7-63, 6-4 | | match details |
Seung-Hoon Oh - last matches
 USA F22 - Hard | ||||
| 08.09.08 1st round | vs. Daniel Andrus | 2-6, 6-2, 4-6 | | match details |
| Korea F3 - Hard | ||||
| 12.05.08 1st round | vs. Hyun-Woo Nam | 3-6, 3-6 | | match details |
 Indonesia F3 - Hard | ||||
| 13.08.07 1st round | vs. Hiroki Kondo | 4-6, 2-6 | | match details |
| Indonesia F - Hard | ||||
| 06.08.07 1st round | vs. Chris Mayanto | 7-63, 6-3 | | match details |
| 06.08.07 2nd round | vs. Hiroki Kondo | 2-6, 7-5, 2-6 | | match details |
| Indonesia F1 - Hard | ||||
| 30.07.07 1st round | vs. Oh-Hee Kwon | 2-6, 5-7 | | match details |
| Busan - Hard | ||||
| 28.05.07 q 1 | vs. Moon-Kyun Kang | 6-3, 6-2 | | match details |
| 28.05.07 q 2 | vs. Amir Weintraub | 6-3, 3-6, 3-6 | | match details |
| Busan - Hard | ||||
| 06.11.06 q 1 | vs. Dong-Whee Choi | 7-65, 3-6, 1-6 | | match details |
| Seoul - Hard | ||||
| 30.10.06 q 1 | vs. Dekel Valtzer | 7-68, 3-6, 2-6 | | match details |
 Thailand F5 - Hard | ||||
| 14.08.06 1st round | vs. Shao-Xuan Zeng | 7-5, 6-3 | | match details |
| 14.08.06 2nd round | vs. Peerakit Siributwong | 6-3, 4-6, 6-1 | | match details |
| 14.08.06 1/4 | vs. Nick Lindahl | 2-6, 5-7 | | match details |
| Thailand F4 - Hard | ||||
| 07.08.06 2nd round | vs. Shao-Xuan Zeng | 2-6, 0-6 | | match details |
| 07.08.06 1st round | vs. Kai-Lung Chang | 6-1, 6-3 | | match details |
| Korea F1 - Hard | ||||
| 13.03.06 1/4 | vs. Woong-Sun Jun | 2-6, 4-6 | | match details |
| 13.03.06 1st round | vs. Sung-Kyun Kang | 2-6, 6-2, 6-3 | | match details |
| 13.03.06 2nd round | vs. Karan Rastogi | 6-1, 7-5 | | match details |
| Busan - Hard | ||||
| 31.10.05 q 1 | vs. Sonchat Ratiwatana | 7-5, 7-63 | | match details |
| 31.10.05 qual. | vs. Frank Moser | 6-75, 7-5, 4-6 | | match details |
| 31.10.05 q 2 | vs. Luka Gregorc | 7-5, 6-3 | | match details |
| Busan - Hard | ||||
| 23.05.05 q 1 | vs. Go Soeda | 1-6, 6-77 | | match details |
| Korea F2 - Hard | ||||
| 09.05.05 1st round | vs. Luka Gregorc | 6-3, 4-6, 3-6 | | match details |
| Korea F1 - Hard | ||||
| 02.05.05 1st round | vs. Ross Hutchins | 7-5, 6-2 | | match details |
| 02.05.05 2nd round | vs. Mark Nielsen | 5-7, 5-7 | | match details |
| Indonesia F1 - Hard | ||||
| 02.08.04 1st round | vs. Tai-Wei Liu | 3-6, 2-6 | | match details |
| Busan - Hard | ||||
| 29.03.04 q 2 | vs. Toshihide Matsui | 3-6, 7-5, 2-6 | | match details |
| 29.03.04 q 1 | vs. Byung-Kook Kang | 6-3, 4-6, 6-4 | | match details |
| Busan - Hard | ||||
| 09.06.03 1st round | vs. Takahiro Terachi | 4-6, 0-6 | | match details |
| Seoul - Hard | ||||
| 21.10.02 q 1 | vs. Fred Hemmes | 4-6, 0-6 | | match details |
