| 1998-11-23 | ATP Tour World Championships | Hard | RR | 5 |  Carlos Moya | 7 |  Karol Kucera | 6-7(5) 7-5 6-3 | H2H | 3 | 149 | 5 | 1 | 53.2% | 74.2% | 50.0% | 6/9 |
| 1998-11-23 | ATP Tour World Championships | Hard | RR | 1 |  Pete Sampras | 7 | Karol Kucera | 6-2 6-1 | H2H | 3 | 48 | 5 | 2 | 68.4% | 92.3% | 66.7% | 0/0 |
| 1998-11-23 | ATP Tour World Championships | Hard | RR | 10 |  Yevgeny Kafelnikov | 7 | Karol Kucera | 6-7(3) 6-3 6-2 | H2H | 3 | 122 | 5 | 8 | 49.5% | 61.7% | 54.2% | 2/6 |
| 1998-11-09 | Stockholm | Hard | R32 | 168 |  Wayne Arthurs (Q) | 7 | Karol Kucera (2) | 7-6(5) 7-6(4) | H2H | 3 | 100 | 13 | 6 | 53.1% | 76.7% | 60.5% | 8/10 |
| 1998-11-02 | Paris Masters | Carpet | R16 | 18 | Mark Philippoussis | 7 | Karol Kucera (7) | 6-4 4-6 7-5 | H2H | 3 | 120 | 10 | 3 | 53.3% | 75.0% | 50.0% | 2/6 |
| 1998-11-02 | Paris Masters | Carpet | R32 | 7 | Karol Kucera (7) | 44 |  Fabrice Santoro | 6-2 3-6 6-0 | H2H | 3 | 97 | 7 | 4 | 58.6% | 62.7% | 44.4% | 9/13 |
| 1998-10-26 | Stuttgart Masters | Hard | R32 | 28 | Todd Martin | 7 | Karol Kucera (8) | 6-2 6-4 | H2H | 3 | 66 | 6 | 2 | 62.2% | 85.7% | 70.6% | 0/0 |
| 1998-10-19 | Ostrava | Carpet | R16 | 72 |  Andrei Medvedev | 8 | Karol Kucera (3) | 6-4 6-7(4) 6-4 | H2H | 3 | 110 | 6 | 3 | 62.1% | 73.4% | 59.0% | 10/12 |
| 1998-10-19 | Ostrava | Carpet | R32 | 8 | Karol Kucera (3) | 40 |  Daniel Vacek | 4-6 7-6(3) 6-3 | H2H | 3 | 122 | 14 | 7 | 53.9% | 74.5% | 57.4% | 5/8 |
| 1998-10-12 | Vienna | Carpet | R16 | 7 | Karol Kucera (5) | 37 |  Tommy Haas | 7-5 6-4 | H2H | 3 | 88 | 7 | 4 | 54.3% | 73.7% | 59.4% | 3/4 |
