| Kabir | - | ||||
| junior | 1 - 0 | ||||
| 1993 | Indonesia Astra Intl Junior Champs |
1 | hardcourt | W | 6-0, 6-2 |
| Kafelnikov | 4 - 5 | ||||
| 2001 | Paris Indoors | 2 | carpet | L | 6-7 (2-7), 4-6 |
| 2000 | Paris Indoors | 3 | carpet | W | 6-4, 6-2 |
| 2000 | Olympics | 3 | hardcourt | L | 6-7 (4-7), 3-6 |
| 2000 | Kooyong Colonial Classic | 1 | hardcourt | W | 7-6 (7-3), 6-7 (8-10), 6-1 |
| 1998 | Wimbledon | 1 | grass | W | 6-7 (5-7), 7-6 (7-1), 6-4, 6-2 |
| 1998 | Stuttgart | 2 | hardcourt | L | 6-4, 4-6, 6-7 (4-7) |
| 1997 | French Open | 4 | clay | L | 2-6, 3-6, 5-7 |
| 1997 | Swiss Indoors | Q | carpet | W | 6-3, 6-7 (5-7), 6-2 |
| 1995 | Canadian Open | 2 | hardcourt | L | 4-6, 7-6 (8-6), 6-7 (8-10) |
| Kennedy | 1 - 0 | ||||
| 2003 | Mercedes-Benz CUp | 1 | hardcourt | W | 6-3, 6-2 |
| Kiefer | 3 - 2 | ||||
| 2002 | Wimbledon | 3 | grass | W | 3-6, 6-3, 6-4, 6-2 |
| 2000 | Salem Open | F | hardcourt | L | 6-7 (4-7), 6-2, 2-6 |
| 1997 | Toulouse | F | hardcourt | L | 5-7, 7-5, 4-6 |
| 1996 | Munich | 1 | clay | W | 6-4, 7-5 |
| 1996 | Australian Open | 1 | hardcourt | W | 7-6, 6-0, 6-1 |
| Kilderry | 1 - 0 | ||||
| 1994 | Adelaide | 2 | grass | W | 6-4, 7-6 |
| Kim, Alex | 1 - 0 | ||||
| 2003 | French Open | 1 | clay | W | 2-6, 6-7 (1-7), 7-5, 6-2, 6-2 |
| Kim, Chi-Wan | 1 - 0 | ||||
| 1994 | Seoul | 1 | hardcourt | W | 7-5, 6-3 |
| Kinner | 0 - 1 | ||||
| 1994 | Sydney Indoor | S | hardcourt | L | 6-7 5-7 |
| Knippschild | 1 - 0 | ||||
| 1997 | Stella Artois | Q | grass | W | 6-2, 6-7 (4-7), 6-4 |
| Kohlmann | 1 - 0 | ||||
| 2003 | Tata Open | 1 | hardcourt | W | 7-6 (7-3), 6-3 |
| Korda | 2 - 0 | ||||
| 2007 | Outback Champions Series in Dallas (Seniors) | 1 | hard | W | 6-4, 4-6, 10-2 |
| 1998 | Paris Open | 2 | carpet | W | 2-6, 6-4, 6-4 |
| Koubek | 1 - 1 | ||||
| 2004 | Qatar Open | 1 | hardcourt | L | 6-3, 1-6, 4-6 |
| 2000 | Hopman Cup | R-R | hardcourt | W | 6-3, 3-6, 6-1 |
| juniors | 1 - 0 | ||||
| 1994 | Wimbledon | 2 | grass | W | 6-2, 6-2 |
| Krajicek | 2 - 5 | ||||
| 2003 | Queens Club | 1 | grass | L | 6-7 (4-7), 3-6 |
| 2002 | Masters Series - Cincinnati | 2 | hardcourt | L | 6-7 (7-9), 2-6 |
| 2002 | Wimbledon | 4 | grass | L | 7-6 (7-2), 6-7 (4-7) 7-6 (7-1), 6-7 (5-7) 4-6 |
| 1999 | Paris Open | 2 | surface | W | 7-5, 6-3 |
| 1998 | Italian Open | 1 | surface | L | 5-7, 7-6, 6-1 |
| 1997 | Monte Carlo | 3 | clay | L | 3-6, 2-6 |
| 1996 | Rome | 3 | clay | L | 4-6, 4-6 |
| 1995 | Tokyo | Q | carpet | W | 6-7 (4-7), 7-6 (7-5), 6-3 |
| Kratzmann | 1 - 0 | ||||
| 1994 | Sydney Indoor | 1 | hardcourt | W | 7-5, 6-4 |
| Kroslak | 1 - 0 | ||||
| 1999 | Australian Open | 3 | hardcourt | W | 3-6, 6-3, 6-4, 6-1 |
| Kucera | 1 - 1 | ||||
| US Open | 1 | hardcourt | L | 4-6, 2-6, 5-7 | |
| 1998 | Paris Open | 3 | carpet | W | 6-4, 4-6, 7-5 |
| Kuerten | 3 - 2 | ||||
| 2003 | Paris Masters | 2 | hardcourt | L | 7-6 (7-5), 6-7 (11-13), 6-7 (1-7) |
| 2003 | Mercedes-Benz Cup | Q | hardcourt | W | 6-3, 3-6, 7-6(7-4) |
| 2000 | Paris Indoors | S | carpet | W | 7-6 (7-5), 7-6 (13-11) |
| 2000 | Rome | 2 | clay | L | 2-6, 2-6 |
| 1998 | Colonial Classic | S | hardcourt | W | 6-4, 3-6, 7-6 (10-8) |
| Kulti | 1 - 0 | ||||
| 1997 | French Open | 1 | clay | W | 6-2, 4-6, 3-6, 6-4, 6-4 |