2006 WTA Tour

The 2006 Sony Ericsson WTA Tour was the 36th season since the founding of the Women's Tennis Association. It commenced on January 2, 2006, and concluded on November 12, 2006, after 61 events.

Justine Henin-Hardenne came out as the winner in a historic three-way battle for the No. 1 ranking at the season-ending WTA Tour Championships, beating out Sharapova and Mauresmo. The Belgian successfully defended her French Open title for her fifth Grand Slam title, and became the first woman since Steffi Graf in 1993 to reach the finals of all four Grand Slams and the WTA Tour Championships. Maria Sharapova won her second Grand Slam title at the U.S. Open, to add to her Wimbledon trophy from 2004. Amélie Mauresmo won her maiden Grand Slam at the Australian Open after a controversial retirement from Henin-Hardenne in the final. However, she later backed it up by winning a rematch with Henin-Hardenne in the Wimbledon final. She was the number one player in the world from March until the final event of the season.

Martina Hingis also made a successful return to the Tour, beginning her comeback at the Gold Coast event in January. She finished the season at No. 6 in the world and won the Tier I title at the Internazionali BNL d'Italia in Rome.

Shortly before the beginning of the season former No. 1 Martina Hingis announced that she would return full-time to the tour for the start of the 2006 season, having already made an unsuccessful comeback attempt at an event in 2005.

Amélie Mauresmo won her first Grand Slam title at the Australian Open after years of questions about her nerves and mental strength. However, her victory was marred by Henin-Hardenne's controversial retirement in the final due to stomach cramps. Defending champion Serena Williams lost in the third round to Daniela Hantuchová, with some commenting on the "extra weight" that she was carrying. The loss was the beginning of a season of injury struggles for the American, which saw her at one point drop out of the top 100. In the doubles tournament, Yan Zi and Zheng Jie produced a historic win for Chinese tennis by becoming the first players to win a Grand Slam of any kind for the nation. Martina Hingis won her first mixed doubles title with Mahesh Bhupathi.

Following the Australian Open Kim Clijsters ascended to the No. 1 position after Lindsay Davenport lost her finalist points. She held it until March when she lost her Indian Wells champion points, allowing Mauresmo to return to the position. The Frenchwoman held it until the final event of the season. Mauresmo had continued her strong start to the season with titles in Paris and Antwerp. Elena Dementieva won her biggest career title to that point in Tokyo. Meanwhile, Henin-Hardenne and Nadia Petrova won the Middle Eastern events in Dubai and Doha.

Maria Sharapova picked up her first title of the season in Indian Wells, beating Dementieva in the final. Svetlana Kuznetsova then won in Miami, her first Tier I title and second biggest overall, after a difficult 2005 season where she failed to back up her breakthrough in 2004 and dropped out the top 10.

The clay court season saw Hingis win in Rome for the biggest title of her comeback, but overall the period was dominated by Nadia Petrova, who went on an impressive 15-match winning streak, leading to titles in Amelia Island, Charleston and Berlin, beating Henin-Hardenne in the final of the latter. Her streak led to her being considered the favourite for the French Open title, but she suffered an injury and thus bowed out in the first round. Henin-Hardenne eventually defended her title and won her fifth Grand Slam by beating Kuznetsova in the final. Czech teenager Nicole Vaidišová made headlines by reaching her first Grand Slam semifinal with victories over Amélie Mauresmo and Venus Williams. The doubles event was won by Lisa Raymond and Samantha Stosur, while Katarina Srebotnik took home the mixed doubles trophy with Nenad Zimonjić.