| Background |
| Country: | Korea |
| Birth Date: | 3 January 1976 |
| Birthplace: | Hoingsung, Korea |
| Residence: | Seoul, Korea |
| Height: | 1.8 metres (5 ft. 11 in.) |
| Weight: | 81.8 kilos (180 lbs.) |
| Plays: | Right |
| Year Turned Pro: | 1995 |
| Current 52 week rank for singles: | 51 |
| Current ATP Champions Race Position: | 81 |
| Current Doubles Rank: | 171 |
| High Rank for singles: | 41 |
| High Rank date for singles: | 21 May 2007 |
| High ATP Champions Race Position: | 5 |
| High ATP Champions Race Position Date: | 13 January 2003 |
| High rank for doubles: | 95 |
| High rank date for doubles: | 16 January 2006 |
| Career titles for singles: | 1 |
| Career titles for doubles: | 1 |
| Career matches won: | 130 |
| Career matches lost: | 136 |
| Year to date matches won: | 8 |
| Year to date matches lost: | 15 |
| Career prize money: | $1,828,108 USD |
| Year to date prize money for singles: | $132,600 USD |
| Year to date prize money for doubles: | $17,780 USD |
