2015 WTA Tour Championships
| 2015 WTA Finals | |
|---|---|
| Date | October 25 – November 1 |
| Edition | 45th (singles) / 40th (doubles) |
| Draw | 8S/8D |
| Surface | Hard / Indoor |
| Location | Singapore |
| Venue | Singapore Indoor Stadium |
| Champions | |
| Singles | |
 Agnieszka Radwańska
|
|
| Doubles | |
 Martina Hingis /  Sania Mirza
|
|
The 2015 WTA Finals was a women's tennis tournament at Singapore. It was the 45th edition of the singles event and the 40th edition of the doubles competition. The tournament was contested by eight singles players and eight doubles teams.
The 2015 WTA Finals took place at the Singapore Indoor Stadium from 26 October to 1 November 2015, and was the 45th edition of the event. The tournament was run by the Women's Tennis Association (WTA) as part of the 2015 WTA Tour. Singapore is now the ninth city to host the WTA Finals since its inauguration in 1972 and will host the event for at least five years. The event also held two exhibition tournaments, WTA Rising Stars Invitational and the WTA Legends Classic.
In singles, point totals are calculated by combining point totals from sixteen tournaments. Of these sixteen tournaments, a player's results from the four Grand Slam events, the four Premier Mandatory tournaments, and the best results from two Premier 5 tournaments must be included.
In doubles, point totals are calculated by any combination of eleven tournaments throughout the year. Unlike in singles, this combination does not need to include results from the Grand Slams or Premier-level tournaments.
The singles and doubles event features eight players in a round robin event, split into two groups of four. Over the first four days of competition, each player meets the other three players in her group, with the top two in each group advancing to the semifinals. The first-placed player in one group meets the second-placed player in the other group, and vice versa. The winners of each semifinal meet in the championship match.
The final standings of each group were determined by the first of the following methods that applied:
The total prize money for the BNP Paribas 2015 WTA Finals was US$7,000,000.
On 6 July, Serena Williams became the first player to qualify for the Championships. However, she announced her withdrawal on 2 October.
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