| Doubles | |
|---|---|
| 1998 Intersport Grand Prix | |
| 1997 Champions |  Anke Huber  Mary Pierce |
| Champions |  Barbara Schett  Patty Schnyder |
| Runners-up | Martina Hingis  Jana Novotná |
| Score | 7–6(7–3), 3–6, 6–3 |
| Draw | 16 |
| Seeds | 4 |
Anke Huber and Mary Pierce were the defending champions but did not compete that year.
Barbara Schett and Patty Schnyder won in the final 7–6(7–3), 3–6, 6–3 against Martina Hingis and Jana Novotná.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Martina Hingis / Jana Novotná (final)
Arantxa Sánchez-Vicario / 
Patricia Tarabini (semifinals)
Ruxandra Dragomir / 
Iva Majoli (semifinals) Barbara Schett / Patty Schnyder (champions)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | M Hingis J Novotná | 6 | 6 | ||||||||||||||||||||||||
| R Bobková C Schneider | 1 | 3 | 1 | M Hingis J Novotná | 6 | 6 | |||||||||||||||||||||
| C Dhenin P Langrová | 4 | 1 | Q | K Freye  P Stoyanova | 1 | 2 | |||||||||||||||||||||
| Q | K Freye P Stoyanova | 6 | 6 | 1 | M Hingis J Novotná | 7 | 6 | ||||||||||||||||||||
| 3 | R Dragomir I Majoli | 3 | 6 | 6 | 3 | R Dragomir I Majoli | 5 | 1 | |||||||||||||||||||
 A Olsza A-G Sidot | 6 | 3 | 4 | 3 | R Dragomir I Majoli | 6 | 5 | 7 | |||||||||||||||||||
| C Cristea V Ruano Pascual | 6 | 7 | C Cristea V Ruano Pascual | 2 | 7 | 5 | |||||||||||||||||||||
 K Habšudová F Labat | 4 | 5 | 1 | Martina Hingis Jana Novotná | 63 | 6 | 3 | ||||||||||||||||||||
 S Noorlander N van Lottum | 3 | 6 | 6 | 4 | Barbara Schett Patty Schnyder | 77 | 3 | 6 | |||||||||||||||||||
 L Courtois  P Hy-Boulais | 6 | 4 | 4 | S Noorlander N van Lottum | 3 | 2 | |||||||||||||||||||||
H Vildová  L Woodroffe | 2 | 4 | 4 | B Schett P Schnyder | 6 | 6 | |||||||||||||||||||||
| 4 | B Schett P Schnyder | 6 | 6 | 4 | B Schett P Schnyder | 77 | 6 | ||||||||||||||||||||
 O Lugina E Tatarkova | 3 | 6 | 3 | 2 | A Sánchez-Vicario P Tarabini | 65 | 2 | ||||||||||||||||||||
| S Krivencheva E Melicharová | 6 | 3 | 6 | S Krivencheva E Melicharová | 4 | 3 | |||||||||||||||||||||
| WC | S Klösel J Wöhr | 1 | 61 | 2 | A Sánchez-Vicario P Tarabini | 6 | 6 | ||||||||||||||||||||
| 2 | A Sánchez-Vicario P Tarabini | 6 | 77 | ||||||||||||||||||||||||
Steffi Graf defeated Martina Hingis in the final, 4–6, 7–5, 6–2 to win the women's singles tennis title at the 1999 French Open. It was her Open Era record-extending 22nd and final major singles title, and she equaled Chris Evert's record of nine French Open final appearances. Graf also became the first player in the Open Era to defeat the top-three ranked players at the same major; defeating world No. 2 Lindsay Davenport in the quarterfinals, No. 3 Monica Seles in the semifinals and No. 1 Hingis in the final. Hingis was attempting to complete the career Grand Slam in singles.
Martina Hingis and Helena Suková were the defending champions but they competed with different partners that year, Hingis with Arantxa Sánchez Vicario and Suková with Larisa Savchenko.
Venus Williams defeated Anna Kournikova in the final, 2–6, 6–4, 6–1 to win the women's singles tennis title at the 1998 Miami Open.
Iva Majoli was the defending champion but lost in the second round to Barbara Schett.
Martina Hingis defeated Venus Williams in the final, 6–3, 2–6, 6–3 to win the women's singles tennis title at the 1998 Italian Open.
Jana Novotná was the defending champion but did not compete that year.
Venus Williams won in the final 6–2, 3–6, 6–2 against Patty Schnyder.
Martina Hingis was the defending champion, but lost in the quarterfinals to Dominique Van Roost.
Martina Hingis was the defending champion but lost in the quarterfinals to Steffi Graf.
Serena Williams defeated Steffi Graf in the final, 6–3, 3–6, 7–5 to win the women's singles tennis title at the 1999 Indian Wells Open. It was the second and last time that the two would contest a professional match.
The 1999 Lipton Championships women's doubles was the women's doubles event of the fifteenth edition of the tennis tournament played at Miami, United States. It is the third WTA Tier I tournament of the year, and part of the US Spring tennis season. Martina Hingis and Jana Novotná were the defending champions and won in the final 0–6, 6–4, 7–6(7–1) against Mary Joe Fernández and Monica Seles.
Martina Hingis defeated Anna Kournikova in the final, 6–4, 6–3 to win the singles tennis title at the 1999 Family Circle Cup.
Lindsay Davenport and Corina Morariu defeated Mariaan de Swardt and Elena Tatarkova in the final, 6–4, 6–4 to win the ladies' doubles tennis title at the 1999 Wimbledon Championships.
The 1999 Australian Open women's doubles was the women's doubles event of the eighty-seventh edition of the Australian Open, the first Grand Slam of the year and the most prestigious tournament in the Asia-Pacific and the Southern Hemisphere. Martina Hingis and Mirjana Lučić were the defending champions, but Hingis competed with Russian Anna Kournikova, and Lučić competed with Frenchwoman Mary Pierce. Lučić and Pierce were defeated in the first round by Christina Singer and Helena Vildová.
Hingis and Kournikova, however, ended up winning the title, defeating first seeds Lindsay Davenport and Natasha Zvereva, 7–5, 6–3. With this win, Hingis won her fifth consecutive Grand Slam title in doubles, and became the only woman to have won three consecutive Australian Open titles in singles and doubles simultaneously. Hingis and her partners defeated Davenport/Zvereva for all five consecutive women's doubles titles starting with the 1998 Australian and ending with the 1999 Australian Open. It was Davenport's fourth consecutive defeat at an Australian Open final.
Serena and Venus Williams defeated Martina Hingis and Anna Kournikova in the final, 6–3, 6–7(2–7), 8–6 to win the women's doubles tennis title at the 1999 French Open. It was the first major title for the Williams sisters, and would be their first step towards completing the career Golden Slam in doubles.
Martina Hingis defeated Julie Halard-Decugis in the final, 6–0, 6–1 to win the singles tennis title at the 1999 WTA German Open.
Martina Hingis defeated the four-time defending champion Monica Seles in the final, 6–4, 6–4 to win the women's singles tennis title at the 1999 Canadian Open. Seles' match win-streak was an Open Era tournament record.
Defending champion Jana Novotná and her partner Martina Hingis defeated the other defending champion Lindsay Davenport and her partner Natasha Zvereva in the final, 6–3, 6–3 to win the women's doubles tennis title at the 1998 US Open. They did not drop a single set en route to the title. With the win, Hingis became the third woman in the Open Era to complete a Grand Slam in doubles, after Martina Navratilova and Pam Shriver. Additionally, Hingis and her partners defeated Davenport/Zvereva in all four major finals in 1998.
Martina Hingis and Jana Novotná defeated the defending champion Natasha Zvereva and her partner Lindsay Davenport in the final, 6–1, 7–6(7–4) to win the women's doubles tennis title at the 1998 French Open. They did not drop a single set en route to the title. It was the second step in an eventual Grand Slam for Hingis.
Martina Hingis and Jana Novotná defeated the defending champion Natasha Zvereva and her partner Lindsay Davenport in the final, 7–6(7–4), 6–4 to win the ladies' doubles tennis title at the 1998 Wimbledon Championships. It was the third step in an eventual Grand Slam for Hingis.