| 2001-07-20 | Davis Cup G2 QF: ISR vs RSA | Hard | RR | 36 |  Harel Levy | 182 |  Marcos Ondruska | 6-2 6-2 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 2001-07-20 | Davis Cup G2 QF: ISR vs RSA | Hard | RR | 162 | Noam Okun | 182 | Marcos Ondruska | 6-2 6-4 6-7(1) 3-6 7-5 | H2H | 5 | - | - | - | - | - | - | - |
| 2001-05-28 | Roland Garros | Clay | R64 | 4 |  Juan Carlos Ferrero (4) | 220 | Marcos Ondruska (Q) | 6-2 6-2 6-0 | H2H | 5 | 99 | 3 | 3 | 55.9% | 81.8% | 73.1% | 1/1 |
| 2001-05-28 | Roland Garros | Clay | R128 | 220 | Marcos Ondruska (Q) | 68 |  Ivan Ljubicic | 2-6 2-6 7-5 7-6(7) 10-8 | H2H | 5 | 291 | 7 | 10 | 59.7% | 68.3% | 48.1% | 16/23 |
| 2001-01-15 | Australian Open | Hard | R128 | 65 |  Greg Rusedski | 202 | Marcos Ondruska (Q) | 3-6 6-3 7-6(3) 6-2 | H2H | 5 | 168 | 8 | 8 | 55.6% | 75.7% | 50.0% | 7/10 |
| 2000-08-14 | Washington | Hard | R64 | 207 |  Alex O'Brien (Q) | 156 | Marcos Ondruska | 6-7(3) 6-4 6-3 | H2H | 3 | 159 | 5 | 3 | 64.0% | 65.8% | 51.2% | 14/17 |
| 2000-07-24 | Los Angeles | Hard | R32 | 60 |  Arnaud Clement (8) | 158 | Marcos Ondruska | 6-3 6-2 | H2H | 3 | 68 | 1 | 0 | 70.0% | 65.7% | 80.0% | 0/1 |
| 2000-07-10 | Newport | Grass | R32 | 150 |  Jens Knippschild | 155 | Marcos Ondruska | 6-3 6-7(5) 6-2 | H2H | 3 | 113 | 10 | 7 | 65.3% | 67.7% | 54.5% | 3/5 |
| 2000-03-13 | Indian Wells Masters | Hard | R64 | 15 |  Patrick Rafter (13) | 157 | Marcos Ondruska (Q) | 6-3 7-6(7) | H2H | 3 | 112 | 17 | 4 | 65.9% | 79.3% | 53.3% | 7/7 |
| 2000-03-06 | Scottsdale | Hard | R32 | 1 | Andre Agassi (1) | 162 | Marcos Ondruska (Q) | 6-2 6-1 | H2H | 3 | 65 | 3 | 1 | 63.6% | 75.0% | 68.8% | 0/0 |
