The 2005 WTA Tour Championships, also known as the Sony Ericsson Championships, was a women's round robin tennis tournament played on indoor hard courts at the Staples Center in Los Angeles, United States. It was the 35th edition of the year-end singles championships, the 30th edition of the year-end doubles championships, and was part of the 2005 WTA Tour. The tournament was held between November 8 and November 13, 2005. Fourth-seeded Amélie Mauresmo won the singles event, the first French player to win the title, and she earned $1,000,000 first-prize money as well as 485 ranking points.
Justine Henin-Hardenne had qualified for the tournament but withdrew due to a hamstring injury.
Amélie Mauresmo defeated Mary Pierce, 5âÂÂ7, 7âÂÂ6<sup>(7âÂÂ3)</sup>, 6âÂÂ4.
Lisa Raymond / Samantha Stosur defeated Cara Black / Rennae Stubbs, 6âÂÂ7<sup>(5âÂÂ7)</sup>, 7âÂÂ5, 6âÂÂ4.
Players in gold have qualified for Los Angeles. Players in brown withdrawn. The low-ranked players in blue after them would be played as alternates in Los Angeles.