| 2005-09-26 | Bangkok | Hard | R32 | 42 |  Jarkko Nieminen (6) | 146 |  Karol Kucera | 6-1 3-1 RET | H2H | 3 | 42 | 2 | 0 | 75.9% | 86.4% | 28.6% | 0/0 |
| 2005-09-23 | Davis Cup WG SF: SVK vs ARG | Hard | RR | 145 | Karol Kucera | 10 |  Mariano Puerta | 4-6 6-3 2-1 RET | H2H | 5 | - | - | - | - | - | - | - |
| 2005-12-02 | Davis Cup WG F: SVK vs CRO | Hard | RR | 9 |  Ivan Ljubicic | 297 | Karol Kucera | 6-3 6-4 6-3 | H2H | 5 | - | - | - | - | - | - | - |
| 2005-08-29 | US Open | Hard | R64 | 15 |  David Ferrer (17) | 141 | Karol Kucera | 6-3 6-0 6-2 | H2H | 5 | 98 | 3 | 3 | 75.6% | 71.2% | 73.7% | 10/10 |
| 2005-08-29 | US Open | Hard | R128 | 141 | Karol Kucera | 209 |  Mark Philippoussis (WC) | 6-4 6-2 7-5 | H2H | 5 | 116 | 10 | 2 | 61.8% | 78.7% | 75.9% | 2/3 |
| 2005-07-04 | Newport | Grass | R16 | 49 |  Vincent Spadea (2) | 150 | Karol Kucera | 6-1 6-4 | H2H | 3 | 64 | 2 | 0 | 55.3% | 76.9% | 66.7% | 0/1 |
| 2005-07-04 | Newport | Grass | R32 | 150 | Karol Kucera | 102 | Jeff Morrison | 7-6(8) 7-6(1) | H2H | 3 | 108 | 4 | 11 | 45.2% | 83.3% | 49.0% | 4/6 |
| 2005-06-20 | Wimbledon | Grass | R64 | 19 | David Nalbandian (18) | 157 | Karol Kucera | 6-2 6-4 6-3 | H2H | 5 | 106 | 4 | 2 | 69.2% | 72.2% | 66.7% | 0/1 |
| 2005-06-20 | Wimbledon | Grass | R128 | 157 | Karol Kucera | 55 |  Luis Horna | 4-6 6-3 6-3 6-4 | H2H | 5 | 159 | 16 | 5 | 61.1% | 80.3% | 59.5% | 2/3 |
| 2005-06-13 | 's-Hertogenbosch | Grass | R32 | 63 |  Davide Sanguinetti (9) | 157 | Karol Kucera | 7-6(1) 6-4 | H2H | 3 | 98 | 2 | 3 | 51.7% | 73.3% | 42.9% | 2/5 |
