| 1991-11-12 | ATP Tour World Championships | Carpet | RR | 5 |  Ivan Lendl | 9 |  Karel Novacek | 6-2 6-2 | H2H | 3 | 61 | 13 | 1 | 65.0% | 92.3% | 64.3% | 0/0 |
| 1991-11-12 | ATP Tour World Championships | Carpet | RR | 2 | Jim Courier | 9 | Karel Novacek | 6-7(6) 7-5 6-4 | H2H | 3 | 162 | 8 | 1 | 61.2% | 76.2% | 57.5% | 2/4 |
| 1991-11-12 | ATP Tour World Championships | Carpet | RR | 6 |  Guy Forget | 9 | Karel Novacek | 6-3 7-6(3) | H2H | 3 | 99 | 13 | 0 | 59.4% | 87.8% | 57.1% | 5/5 |
| 1991-11-04 | Moscow | Carpet | R16 | 46 |  Carl-Uwe Steeb | 10 | Karel Novacek (1) | 6-3 7-5 | H2H | 3 | 82 | 4 | 1 | 68.3% | 69.8% | 55.0% | 2/4 |
| 1991-11-04 | Moscow | Carpet | R32 | 10 | Karel Novacek (1) | 123 | Udo Riglewski | 7-6(5) 6-2 | H2H | 3 | 76 | 6 | 2 | 53.4% | 90.3% | 66.7% | 0/0 |
| 1991-10-28 | Paris Masters | Carpet | QF | 23 |  Jonas Svensson | 10 | Karel Novacek (8) | 6-4 6-2 | H2H | 3 | 66 | 2 | 0 | 73.0% | 67.4% | 52.9% | 3/4 |
| 1991-10-28 | Paris Masters | Carpet | R16 | 10 | Karel Novacek (8) | 94 | Nicklas Kulti (Q) | 6-3 6-2 | H2H | 3 | 63 | 10 | 1 | 57.4% | 88.9% | 55.0% | 2/2 |
| 1991-10-28 | Paris Masters | Carpet | R32 | 10 | Karel Novacek (8) | 49 | MaliVai Washington | 6-4 6-4 | H2H | 3 | 80 | 7 | 0 | 55.6% | 88.6% | 50.0% | 4/4 |
| 1991-10-21 | Stockholm Masters | Carpet | R16 | 39 | Richey Reneberg | 10 | Karel Novacek (9) | 2-6 6-3 6-3 | H2H | 3 | 100 | 3 | 2 | 65.3% | 73.5% | 42.3% | 0/3 |
| 1991-10-21 | Stockholm Masters | Carpet | R32 | 10 | Karel Novacek (9) | 62 |  Wally Masur | 6-4 6-7(1) 6-4 | H2H | 3 | 105 | 10 | 3 | 55.4% | 86.3% | 53.7% | 0/2 |
