| 2008-09-19 | Davis Cup WG PO: NED vs KOR | Clay | RR | 252 |  Thiemo de Bakker | 246 |  Woong-Sun Jun | 6-2 6-1 6-3 | H2H | 5 | - | - | - | - | - | - | - |
| 2008-07-28 | Cincinnati Masters | Hard | R32 | 37 |  Philipp Kohlschreiber | 252 | Woong-Sun Jun (LL) | 6-2 6-2 | H2H | 3 | 61 | 6 | 1 | 75.6% | 79.4% | 63.6% | 1/1 |
| 2008-07-14 | Indianapolis | Hard | R16 | 8 |  James Blake (1) | 293 | Woong-Sun Jun (Q) | 6-3 7-5 | H2H | 3 | 72 | 10 | 3 | 49.4% | 86.8% | 48.7% | 7/8 |
| 2008-07-14 | Indianapolis | Hard | R32 | 293 | Woong-Sun Jun (Q) | 93 |  Chris Guccione | 6-4 7-6(4) | H2H | 3 | 83 | 5 | 2 | 62.9% | 86.4% | 46.2% | 3/4 |
| 2008-07-07 | Newport | Grass | R32 | 93 | Donald Young (6) | 297 | Woong-Sun Jun (Q) | 6-3 2-6 6-4 | H2H | 3 | 98 | 3 | 7 | 53.8% | 74.0% | 51.2% | 6/8 |
| 2008-05-18 | Casablanca | Clay | R32 | 117 |  Pablo Cuevas | 236 | Woong-Sun Jun (Q) | 6-4 6-1 | H2H | 3 | 65 | 7 | 1 | 66.1% | 75.7% | 63.2% | 3/3 |
| 2008-02-08 | Davis Cup WG R1: GER vs KOR | Clay | RR | 321 | Woong-Sun Jun | 62 | Michael Berrer | 6-1 3-6 6-4 | H2H | 3 | - | - | - | - | - | - | - |
| 2007-10-01 | Tokyo | Hard | R64 | 106 |  Marin Cilic | 387 | Woong-Sun Jun (Q) | 6-2 6-2 | H2H | 3 | 76 | 2 | 2 | 50.9% | 74.1% | 53.8% | 4/5 |
| 2007-09-21 | Davis Cup WG PO: SVK vs KOR | Clay | RR | 165 |  Lukas Lacko | 392 | Woong-Sun Jun | 6-3 6-2 7-6(2) | H2H | 5 | - | - | - | - | - | - | - |
| 2007-09-10 | Beijing | Hard | R32 | 129 |  Rik De Voest | 407 | Woong-Sun Jun (Q) | 6-4 7-6(4) | H2H | 3 | 93 | 2 | 3 | 54.7% | 80.5% | 52.9% | 3/4 |
