| 2001-02-09 | Davis Cup G1 QF: ARG vs MEX | Clay | RR | 18 |  Franco Squillari | 626 |  Oscar Ortiz | 6-1 6-4 6-0 | H2H | 5 | - | - | - | - | - | - | - |
| 2001-02-09 | Davis Cup G1 QF: ARG vs MEX | Clay | RR | 38 | Gaston Gaudio | 626 | Oscar Ortiz | 6-3 6-0 | H2H | 3 | - | - | - | - | - | - | - |
| 1996-07-22 | Atlanta Olympics | Hard | R32 | 38 |  Andrea Gaudenzi | 232 | Oscar Ortiz | 6-1 7-6 | H2H | 3 | - | - | - | - | - | - | - |
| 1996-07-22 | Atlanta Olympics | Hard | R64 | 232 | Oscar Ortiz | 217 |  Dinu Pescariu (WC) | 6-2 6-2 | H2H | 3 | - | - | - | - | - | - | - |
| 1996-07-15 | Washington | Hard | R64 | 137 |  Sargis Sargsian (Q) | 229 | Oscar Ortiz | 6-2 6-4 | H2H | 3 | 67 | 6 | 2 | 60.0% | 69.4% | 54.2% | 3/5 |
| 1996-03-04 | Mexico City | Clay | R32 | 40 | Javier Frana (4) | 180 | Oscar Ortiz (WC) | 6-2 6-7(4) 7-5 | H2H | 3 | 126 | 13 | 7 | 40.8% | 78.6% | 55.7% | 2/5 |
| 1995-07-17 | Washington | Hard | R64 | 198 |  Wade McGuire (WC) | 191 | Oscar Ortiz | 3-6 6-2 6-3 | H2H | 3 | 107 | 5 | 2 | 50.0% | 84.2% | 44.7% | 4/7 |
| 1995-07-10 | Newport | Grass | R32 | 76 |  Daniel Vacek (5) | 188 | Oscar Ortiz | 6-3 6-2 | H2H | 3 | 46 | 6 | 1 | 58.1% | 88.0% | 83.3% | 1/1 |
| 1995-03-31 | Davis Cup G1 SF: MEX vs BRA | Hard | RR | 290 |  Fabio Silberberg | 178 | Oscar Ortiz | 2-6 6-3 6-3 | H2H | 3 | - | - | - | - | - | - | - |
| 1995-02-27 | Mexico City | Clay | R32 | 84 | Bryan Shelton | 177 | Oscar Ortiz (WC) | 6-0 1-6 6-2 | H2H | 3 | 92 | 4 | 11 | 49.4% | 74.4% | 42.5% | 4/7 |
