 Chile: Santiago - Doubles - Main |
|---|
| 1/8-finals | Mantilla F./Massu N. | Alonso J./Lapentti N. | 2:1 (6:3, 1:6, 7:6) | details | 09.11.1998 |
 Colombia: Bogota - Doubles - Main |
|---|
| 1/8-finals | Alonso J./Lapentti N. | Koves G./Taino E. | 0:2 (5:7, 5:7) | details | 02.11.1998 |
 Mexico: Mexico City - Doubles - Main |
|---|
| 1/8-finals | Alonso J./Lapentti N. | Hrbaty D./Sargsian S. | 0:2 (5:7, 3:6) | details | 26.10.1998 |
 France: French Open - Doubles - Main |
|---|
| Quarter-finals | Alonso J./Lapentti N. | Bhupathi M./Paes L. | 0:2 (3:6, 4:6) | details | 04.06.1998 |
| 1/8-finals | Alonso J./Lapentti N. | Black W./Lareau S. | 2:1 (6:4, 63:7, 6:2) | details | 02.06.1998 |
| 1/16-finals | Alonso J./Lapentti N. | Sapsford D./Wilkinson C. | 2:0 (6:4, 6:4) | details | 31.05.1998 |
| 1/32-finals | Ferreira E./Leach R. | Alonso J./Lapentti N. | 1:2 (62:7, 7:5, 4:6) | details | 29.05.1998 |
 Germany: Hamburg - Doubles - Main |
|---|
| 1/16-finals | Alonso J./Lapentti N. | Carbonell T./Roig F. | 1:2 (6:4, 4:6, 0:6) | details | 04.05.1998 |
 Monaco: Monte Carlo - Doubles - Main |
|---|
| 1/8-finals | Dosedel S./Olhovskiy A. | Alonso J./Lapentti N. | 2:0 (7:6, 6:2) | details | 21.04.1998 |
| 1/16-finals | Alonso J./Lapentti N. | Bjorkman J./Kulti N. | 2:1 (2:6, 6:2, 7:6) | details | 20.04.1998 |
 USA: Scottsdale - Doubles - Main |
|---|
| 1/8-finals | Alonso J./Lapentti N. | Kinnear K./Wheaton D. | 0:2 (1:6, 4:6) | details | 02.03.1998 |
| Chile: Santiago - Doubles - Main |
|---|
| Final | Alonso J./Lapentti N. | Davids H. J./Kratzmann A. | 1:2 (6:7, 7:5, 4:6) | details | 09.11.1997 |
| Semi-finals | Alonso J./Lapentti N. | Arnold-Ker L./Orsanic D. | 2:1 (4:6, 7:6, 7:5) | details | 07.11.1997 |
| Quarter-finals | Alonso J./Lapentti N. | Keil M./Middleton T. J. | 2:1 (4:6, 7:6, 7:6) | details | 05.11.1997 |
| 1/8-finals | Johnson D./Montana F. | Alonso J./Lapentti N. | 0:2 (3:6, 4:6) | details | 03.11.1997 |
