Virginia Ruano Pascual and Paola Suárez were the two-time defending champions, but they were defeated in the second round by Anna Chakvetadze and Elena Vesnina.
Cara Black and Liezel Huber were the defending champions, but did not play together. Black partnered with Rennae Stubbs and Huber partnered with Martina Navratilova but both pairs lost to Yan Zi and Zheng Jie, in the semifinals and quarterfinals respectively.
Nathalie Dechy and Vera Zvonareva defeated Dinara Safina and Katarina Srebotnik in the final, 7–6(7–5), 7-5 to win the women's doubles title at the 2006 US Open.
Yan Zi and Zheng Jie were the defending champions but lost in the semifinals to Chan Yung-jan and Chuang Chia-jung
Cara Black and Liezel Huber won the title, defeating Chan Yung-jan and Chuang Chia-jung in the final 6–4, 6–74, 6–1
Yan Zi and Zheng Jie were the defending champions but Zheng did not compete. Yan partnered with Peng Shuai but lost in the quarterfinals to Alicia Molik and Mara Santangelo.
Virginia Ruano Pascual and Paola Suárez were the defending champions, but Suárez did not participate due to injury. Ruano Pascual partnered Conchita Martínez, but lost in the first round to Jennifer Hopkins and Mashona Washington.
Twelfth-seeded Yan Zi and Zheng Jie defeated first-seeded Lisa Raymond and Samantha Stosur, 2–6, 7–6 (7), 6–3 to win the women's doubles title at the 2006 Australian Open.
Lisa Raymond and Samantha Stosur were the defending champions, but Stosur chose not to participate, and only Raymond competed that year.
Raymond partnered with Maria Kirilenko, but lost in the first round to Daniela Hantuchová and Ai Sugiyama.
Two-time defending champion Serena Williams defeated Elena Dementieva in the final, 6–1, 6–1 to win the women's singles tennis title at the 2004 Miami Open.
Serena Williams and Venus Williams were the defending champions from 2010; however, they were unable to defend their title because of Serena's foot injury, sustained in the middle of the 2010 season.
Only the 1st, 2nd, 4th, and Ivanovic/Kirilenko made it into the semifinals, with the 4th and 2nd seeds respectively getting eliminated in three sets. The 4th seed team going down to the 1st seed team, 46 63 61, while the 2nd seed team, going down to Ivanovic and Kirilenko, 63 26 62. The 3rd seeded team went down to Ivanovic and Kirilenko in straight sets, in the first round. Yan Zi and Zheng Jie emerged as the champions, beating Serbian Ana Ivanovic and Russian Maria Kirilenko in three sets.
Serena Williams and Venus Williams were the defending champions. However, Serena withdrew from the tournament because of a foot injury and Venus chose to participate in the singles event only. Vania King and Yaroslava Shvedova defeated Liezel Huber and Nadia Petrova 2–6, 6–4, 7–6(7–4) in the final. This match was played over two days due to heavy rainfall on September 12.
Hsieh Su-wei and Peng Shuai were the defending champions, but they competed with different partners.
Hsieh played with Natalie Grandin, while Peng partnered with Kimiko Date-Krumm, but they all lost in the second round .
In the end, it was Chuang Chia-jung and Olga Govortsova who won in the final against Gisela Dulko and Flavia Pennetta, 7–6(2), 1–6, [10–7].
Li Ting and Sun Tiantian were the defending champions, but both chose not to participate that year.
Victoria Azarenka was the defending champion, but withdrew before her quarterfinal match against Caroline Wozniacki.
The doubles Tournament at the 2006 Pacific Life Open took place between March 6 and March 19 on the outdoor hard courts of the Indian Wells Tennis Garden in Indian Wells, United States. Lisa Raymond and Samantha Stosur won the title, defeating Virginia Ruano Pascual and Meghann Shaughnessy in the final.
The doubles Tournament at the 2006 Qatar Telecom German Open took place between May 5 and May 13 on the outdoor clay courts of the Rot-Weiss Tennis Club in Berlin, Germany. Yan Zi and Zheng Jie won the title, defeating Elena Dementieva and Flavia Pennetta in the final.
Nadia Petrova and Meghann Shaughnessy were the defending champions, but had different outcomes. While Petrova decided to focus only on the singles tournament, Shaughnessy partnered with Anna-Lena Grönefeld and lost in semifinals to Maria Kirilenko and Anabel Medina Garrigues.
Nadia Petrova and Meghann Shaughnessy were the defending champions, but Petrova had to forfeit the tournament due to a right pectoralis strain. Shaughnessy competed alongside Anna-Lena Grönefeld, but the pair withdrew in quarterfinals against Eleni Daniilidou and Jennifer Russell.
Nicole Vaidišová was the defending champion from 2005, but decided not to compete in 2006.
Vania King 
Jelena Kostanić 
Chan Yung-jan 
