Amanda Coetzer and Inés Gorrochategui were the defending champions but did not compete that year.
Meredith McGrath was the defending champion, but did not participate this year.
Elizabeth Smylie and Linda Wild were the defending champions but only Wild competed that year with Nathalie Tauziat.
Zina Garrison-Jackson and Larisa Neiland were the defending champions but only Garrison-Jackson competed that year with Katrina Adams.
Manuela Maleeva-Fragniere and Leila Meskhi were the defending champions. Maleeva-Fragniere retired from tennis earlier that year, but only Meskhi competed that year with Eugenia Maniokova.
Nathalie Tauziat was the defending champion and was one of the four semifinalists.
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.
Defending champions Cyril Suk and Helena Suková defeated Andrei Olhovskiy and Larisa Neiland in the final, 4–6, 6–3, 6–4 to win the mixed doubles tennis title at the 1997 Wimbledon Championships.
Max Mirnyi and Serena Williams defeated Mahesh Bhupathi and Mirjana Lučić in the final, 6–4, 6–4, to win the mixed doubles tennis title at the 1998 Wimbledon Championships.
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.
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 du Maurier Open doubles was the doubles event of the one hundred and tenth edition of the Canadian Open; a WTA Tier I tournament and the most prestigious women's tennis tournament held in Canada.
The 1999 DFS Classic was a women's tennis tournament played on grass courts at the Edgbaston Priory Club in Birmingham in the United Kingdom that was part of Tier III of the 1999 WTA Tour. The tournament was held from 7 June until 13 June 1999. Fifth-seeded Julie Halard-Decugis won the singles title.
There was no defending champion, due to the cancellation of the semifinals in 1998 due to rain.
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.
Corina Morariu and Larisa Neiland were the reigning champions, but they did not return to defend their title.
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 were the defending champions, but none of them competed this year. Novotná also retired at the end of the 1999 season.
Alexandra Fusai and Nathalie Tauziat were the defending champions, but lost in quarterfinals to Nicole Arendt and Manon Bollegraf.
