| 1/11/99 Adidas International, Doubles | ||||
| V. Willaims/ S. Williams | 1st | 2nd | 3rd | |
| 1R | A. Coetzer/ N. Zvereva(4) | 7:5 | 7:5 | 0:0 |
| QF | C. Martinez/ I. Gorrochategui | 6:4 | 6:1 | 0:0 |
| SF | M.J Fernandez/ A. Huber | 7:6 | 5:7 | 5:7 |
| 1/18/99 Australian Open, Doubles | ||||
| V.Williams/S.Williams | 1st | 2nd | 3rd | |
| 1R | C. Barclaya/K. Guse | 6:4 | 6:1 | 0:0 |
| 2R | C. Singer/H. Vildova | 6:3 | 6:1 | 0:0 |
| 3R | M-De Swardt/E. Tatarkova(7) | 7:6 | 6:2 | 0:0 |
| QF | L. Nieland/A.S Vicario(4) | 6:4 | 4:6 | 6:1 |
| SF | L. Dogenport/N Zvereva(1) | 6:1 | 4:6 | 4:6 |
| 2/15/99 Faber Grand Prix (Doubles), Germany | ||||
| V. Williams/S. Williams | 1st | 2nd | 3rd | |
| 1RD | E. Wagner/A Sidot | 6:1 | 6:1 | 0:0 |
| QF | M. Bollegraf/C. Vis | 6:1 | 6:4 | 0:0 |
| SF | A. Sugiyama/E. Likhovtseva | 6:2 | 7:6 | 0:0 |
| F | A. Fusai/N. Tauziat | 5:7 | 6:2 | 6:2 |
| 3/1/99 Everts Cup, Doubles | ||||
| V. Williams/S. Williams | 1st | 2nd | 3rd | |
| 1RD | Adam/Graham | 6:0 | 6:1 | -- |
| 2RD | Farina/Wild | 4:6 | 6:4 | 6:2 |
| QF | L. Davenport/N. Zvereva(1) | 4:6 | 6:2 | 6:3 |
| SF | M.J Fernandez/J. Novotna | 3:6 | 4:6 | -- |
| 3/15/99 Lipton Championships, Doubles | ||||
| S. Williams/V. Williams(7) | 1st | 2nd | 3rd | |
| 1RD | Bye | -- | -- | -- |
| 2RD | Debbie Graham/Rita Grande | 6:4 | 7:5 | -- |
| QF | Silvia Farina/Karina Habsudova(13) | -- | -- | -- |
| QF | Venus and Serena Withdrew | -- | -- | -- |