United Kingdom: Wimbledon - Mixed Doubles - Main |
| 1/16-finals | Koenig R./Callens E. | Knowles M./Ruano Pascual V. | 2:0 (6:3, 6:2) | details | 24.06.2004 |
France: French Open - Mixed Doubles - Main |
| 1/8-finals | Gasquet R./Golovin T. | Knowles M./Ruano Pascual V. | 2:0 (7:5, 6:3) | details | 02.06.2004 |
| 1/16-finals | Erlich J./Huber L. | Knowles M./Ruano Pascual V. | 0:2 (3:6, 4:6) | details | 01.06.2004 |
Australia: Australian Open - Mixed Doubles - Main |
| Quarter-finals | Knowles M./Ruano Pascual V. | Erlich J./Huber L. | 1:2 (7:66, 3:6, 5:10) | details | 28.01.2004 |
| 1/8-finals | Knowles M./Ruano Pascual V. | Friedl L./Husarova J. | WO. | details | 27.01.2004 |
| 1/16-finals | Knowles M./Ruano Pascual V. | Shimada T./Asagoe S. | 2:1 (6:4, 60:7, 10:2) | details | 26.01.2004 |
USA: US Open - Mixed Doubles - Main |
| Quarter-finals | Ruano Pascual V./Knowles M. | Srebotnik K./Bryan B. | 1:2 (6:2, 2:6, 7:10) | details | 02.09.2003 |
| 1/8-finals | Ruano Pascual V./Knowles M. | Shaughnessy M./Leach R. | WO. | details | 31.08.2003 |
| 1/16-finals | Ruano Pascual V./Knowles M. | Cargill A./Vahaly B. | 2:0 (6:1, 6:2) | details | 28.08.2003 |