The 1999 Thalgo Australian Women's Hardcourts doubles was the doubles event of the third edition of the Thalgo Australian Women's Hardcourts; a WTA Tier III tournament held in the Gold Coast. Elena Likhovtseva and Ai Sugiyama were the defending champions but lost in the first round to Anke Huber and Mary Pierce.
The 1999 ANZ Tasmanian International singles was the singles event of the sixth edition of the ANZ Tasmanian International. Patty Schnyder was the defending champion but did not compete that year.
The 1999 Toray Pan Pacific Open doubles was the doubles event of the twenty-fourth edition of the Toray Pan Pacific Open Tennis Tournament, the first WTA Tier I tournament of the year. Martina Hingis and Mirjana Lučić were the defending champions but only Hingis competed that year with Jana Novotná.
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 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.
Martina Hingis and Anna Kournikova were the defending champions but Hingis did not compete this year. Kournikova partnered Natasha Zvereva and reached the quarterfinals where they were beaten by Els Callens and Dominique Van Roost.
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.
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.
Martina Hingis and Anna Kournikova defeated Larisa Neiland and Arantxa Sánchez Vicario in the final, 6–4, 6–4 to win the doubles tennis title at the 1999 WTA Tour Championships.
Venus Williams defeated Martina Hingis in the final, 6–3, 6–4 to win the singles tennis title at the 1999 European Indoor Championships.
The 1999 Croatian Bol Ladies Open doubles was the doubles event of the sixth edition of the Croatian Bol Ladies Open, a WTA Tier IV tournament and the most prestigious women's tennis tournament held in Croatia. Laura Montalvo and Paola Suárez were the defending champions, Montalvo having won the last three doubles competitions in Bol, but neither competed this year.
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.
The 1999 Bank of the West Classic singles was the singles event of the twenty-eighth edition of the first tournament in the US Open Series.
The 1999 TIG Classic singles was the singles event of the twentieth edition of the second tournament in the US Open Series.
The 1999 TIG Classic doubles was the doubles event of the twentieth edition of the second tournament in the US Open Series.
The 1999 Toyota Princess Cup doubles was the tennis doubles event of the third edition of the first hardcourt tournament after the US Open. Anna Kournikova and Monica Seles were the defending champions, but neither competed this time.
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 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.
The women's doubles Tournament at the 2000 Indian Wells Masters took place between March 10 and March 19 on the outdoor hard courts of the Indian Wells Tennis Garden in Indian Wells, California, United States. Lindsay Davenport and Corina Morariu won the title, defeating Anna Kournikova and Natasha Zvereva in the final.
The 1999 Advanta Championships of Philadelphia doubles was the tennis doubles event of the seventeenth edition of the Advanta Championships of Philadelphia; a WTA Tier II tournament held in Philadelphia, Pennsylvania. Elena Likhovtseva and Ai Sugiyama were the defending champions, but Sugiyama did not compete this year. Likhovtseva competed with Amanda Coetzer, but were defeated in the quarterfinals by Lisa Raymond and Rennae Stubbs.
Lindsay Davenport and Corina Morariu were the defending champions, but Morariu did not compete this year. Davenport teamed up with Anna Kournikova; they ended as runners-up.
Lindsay Davenport 
Anna Kournikova 
