United Kingdom: Wimbledon - Singles - Main |
| 1/16-finals | Sampras P. | Sapsford D. | 3:0 (6:3, 6:4, 7:5) | details | 03.07.1999 |
| 1/32-finals | Blanco G. | Sapsford D. | 1:3 (3:6, 6:3, 4:6, 2:6) | details | 01.07.1999 |
| 1/64-finals | Alonso J. | Sapsford D. | 0:3 (2:6, 2:6, 5:7) | details | 29.06.1999 |
United Kingdom: Wimbledon - Singles - Qualification |
| Final | Sapsford D. | Joyce M. | 3:2 (6:4, 3:6, 4:6, 6:4, 8:6) | details | 19.06.1999 |
| Semi-finals | Korda P. | Sapsford D. | 1:2 (6:3, 6:7, 4:6) | details | 18.06.1999 |
France: Lyon 2 - Singles - Main |
| 1/16-finals | Sapsford D. | Ferreira W. | 1:2 (2:6, 6:3, 4:6) | details | 19.10.1998 |
USA: US Open - Singles - Qualification |
| Semi-finals | Sapsford D. | di P. A. | 0:2 (3:6, 3:6) | details | 27.08.1998 |
| Quarter-finals | Sapsford D. | Boetsch A. | 2:1 (3:6, 6:3, 7:6) | details | 25.08.1998 |
France: French Open - Singles - Qualification |
| Quarter-finals | Sapsford D. | Sell M. | 0:2 (1:6, 2:6) | details | 18.05.1998 |
Japan: Tokyo - Singles - Main |
| 1/32-finals | Iwabuchi S. | Sapsford D. | 1:0 RET. (7:5, 0:1) | details | 13.04.1998 |
Australia: Australian Open - Singles - Qualification |
| Quarter-finals | Sapsford D. | Trifu G. | 0:2 (65:7, 2:6) | details | 19.01.1998 |