Martina Hingis and Arantxa Sánchez-Vicario were the defending champions but did not compete that year.
Arantxa Sánchez-Vicario and Natasha Zvereva were the defending champions but only Zvereva competed that year with Mary Pierce.
The 1999 Sydney International women's doubles was the doubles event of the fourteenth edition of the ASB Classic; a WTA Tier II tournament and the second most prestigious women's tennis tournament held in Australia. Martina Hingis and Helena Suková were the defending champions but did not compete that year.
The 1999 Evert Cup doubles was the doubles event of the eleventh edition of the tennis tournament played at Indian Wells, California, United States. It was the second WTA Tier I tournament of the year, and part of the US Spring tennis season. Lindsay Davenport and Natasha Zvereva were the defending champions but lost in the quarterfinals to Serena Williams and Venus Williams.
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.
The 1999 Family Circle Cup doubles was the doubles event of the twenty-seventh edition of the tennis tournament played at Hilton Head, United States. It is the third WTA Tier I tournament of the year, and part of the US Spring tennis season. Conchita Martínez and Patricia Tarabini were the defending champions but lost in the second round to Silvia Farina and Corina Morariu.
The 1999 Bausch & Lomb Championships doubles was the doubles event of the twentieth edition of the Bausch & Lomb Championships; a WTA Tier II tournament held in Amelia Island, Florida, United States, played on green clay. Sandra Cacic and Mary Pierce were the defending champions but lost in the quarterfinals to Lisa Raymond and Rennae Stubbs.
The 1999 Direct Line International Championships singles was the singles event of the twenty-fifth edition of the Eastbourne International, a WTA Tier II tournament held in Eastbourne, England, United Kingdom and part of the European grass court season. Jana Novotná was the defending champion but did not participate this year, her final on tour before retiring in the fall.
The 1999 Direct Line International Championships doubles was the doubles event of the twenty-fifth edition of the Eastbourne International, a WTA Tier II tennis tournament held in Eastbourne, England and part of the European grass court season. The draw consisted of 16 teams of which four were seeded. Mariaan de Swardt and Jana Novotná were the defending doubles champions but each competed with different partners in 1999. De Swardt partnered Elena Tatarkova and reached the semifinals where they lost to Martina Hingis and Anna Kournikova. Novotná teamed with Natasha Zvereva and they retired in the final to Hingis and Kournikova after losing the first set 4–6.
Nathalie Tauziat defeated Barbara Schett in the final, 2–6, 6–4, 6–1 to win the women's singles tennis title at the 1999 Kremlin 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. This would also be Zvereva’s 10th consecutive women’s doubles grand slam finals, with 3 different partners.
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.
Serena and Venus Williams defeated Chanda Rubin and Sandrine Testud in the final, 4–6, 6–1, 6–4 to win the women's doubles tennis title at the 1999 US Open. It was the second doubles major title for the Williams sisters, and their second step towards completing the career Golden Slam in doubles.
The 1999 WTA German Open singles was the singles event of the fifty-fifth edition of the tennis tournament played at Berlin, Germany, the most prestigious tennis tournament in Latin Europe. It was the sixth WTA Tier I tournament of the year, and part of the European claycourt season. Lindsay Davenport and Natasha Zvereva were the defending champions, but only Zvereva participated this year with Mary Pierce. They were eliminated in the first round by Brie Rippner and Tara Snyder.
The 1999 Swisscom Challenge doubles was the doubles event of the sixteenth edition of the Swisscom Challenge; a WTA Tier I tournament and the most prestigious tournament held in Switzerland. Serena and Venus Williams were the reigning champions, but neither competed this year.
The 1999 Porsche Tennis Grand Prix doubles was the tennis doubles event at the 1999 Porsche Tennis Grand Prix, the twenty-second edition of the most prestigious tournament in Baden-Württemberg. Lindsay Davenport and Natasha Zvereva were the defending champions, but they did not compete together this year. Davenport competed with Martina Hingis as the first seed, while Zvereva competed with Elena Tatarkova. Davenport and Hingis withdrew in the quarterfinals due to Davenport having a wrist injury, whilst Tatarkova and Zvereva were knocked out in the first round.
Julie Halard-Decugis and Ai Sugiyama were the defending champions, but did not compete this year.
Martina Hingis and Anna Kournikova were the defending champions, but competed this year with different partners. Hingis partnered with Mary Pierce and finished the tournament as runners-up, while Kournikova teamed up with Barbara Schett and lost in semifinals to Lisa Raymond and Rennae Stubbs.
Lindsay Davenport and Natasha Zvereva were the defending champions, but Davenport did not compete this year. Zvereva teamed up with Katarina Srebotnik and lost in quarterfinals to Lisa Raymond and Rennae Stubbs.
Lisa Raymond 
Rennae Stubbs 
Julie Halard-Decugis 
Anke Huber 
