# 2009 WTA Tour Championships – Singles

Serena Williams defeated the defending champion, her sister Venus Williams, in the final, 6–2, 7–6$^{(7–4)}$ to win the singles title. It was her second Tour Finals singles title in eight years. Serena remained undefeated throughout the tournament, despite being match point down against Venus in their round robin match.
Caroline Wozniacki and Victoria Azarenka made their debuts at the event.
Dinara Safina and Serena Williams were in the contention of year-end no. 1 ranking. Williams secured the year-end no. 1 ranking for the second time when Safina withdrew from the tournament.

## Players

* Dinara Safina (round robin, retired/withdrew due to a back injury)
* Serena Williams (champion)
* Svetlana Kuznetsova (round robin)
* Caroline Wozniacki (semifinals, retired due to a left abdominal strain)
* Elena Dementieva (round robin)
* Victoria Azarenka (round robin, retired due to cramping)
* Venus Williams (final)
* Jelena Janković (semifinals)

## Alternates

* Vera Zvonareva (replaced Safina) (round robin, withdrew due to ankle injury)
* Agnieszka Radwańska (replaced Zvonareva) (round robin)

## Draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final |
| 8 | Jelena Janković | 7 | 3 | 4 | | | | |
| 7 | Venus Williams | 5 | 6 | 6 | | | | |
| 7 | Venus Williams | 5 | 6 | 6 | 7 | Venus Williams | 2 | 6$^4$ |
| | | | | | 2 | Serena Williams | 6 | 7$^7$ |
| 2 | Serena Williams | 6 | 0 | | 2 | Serena Williams | 6 | 7$^7$ |
| 4 | Caroline Wozniacki | 4 | 1$^r$ | | | | | |

### White group

| | | Safina Zvonareva Radwańska | Wozniacki | Azarenka | Janković | RR W–L | Set W–L | Game W–L | Standings |
| 1 Alt Alt | Dinara Safina Vera Zvonareva Agnieszka Radwańska | | 0–6, 7–6$^{(7-3)}$, 4–6 (w/ Zvonareva) | 4–6, 7–5, 4–1, ret. (w/ Radwańska) | 1–1, ret. (w/ Safina) | 0–1 0–1 1–0 | 0–0 1–2 2–1 | 1–1 11–18 17–12 | X X 4 |
| 4 | Caroline Wozniacki | 6–0, 6–7$^{(3–7)}$, 6–4 (w/ Zvonareva) | | 1–6, 6–4, 7–5 | 2–6, 2–6 | 2–1 | 4–4 (50%) | 36–38 (48,6%) | 2 |
| 6 | Victoria Azarenka | 6–4, 5–7, 1–4, ret. (w/ Radwańska) | 6–1, 4–6, 5–7 | | 6–2, 6–3 | 1–2 | 4–4 (50%) | 39–36 (52%) | 3 |
| 8 | Jelena Janković | 1–1, ret. (w/ Safina) | 6–2, 6–2 | 2–6, 3–6 | | 2–1 | 2–2 (50%) | 18–17 (51,4%) | 1 |
Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.

### Maroon group

| | | S Williams | Kuznetsova | Dementieva | V Williams | RR W–L | Set W–L | Game W–L | Standings |
| 2 | Serena Williams | | 7–6$^{(8–6)}$, 7–5 | 6–2, 6–4 | 5–7, 6–4, 7–6$^{(7–4)}$ | 3–0 | 6–1 (85,7%) | 44–34 (56,4%) | 1 |
| 3 | Svetlana Kuznetsova | 6–7$^{(6–8)}$, 5–7 | | 6–3, 6–2 | 2–6, 7–6$^{(7–3)}$, 4–6 | 1–2 | 3–4 (42,9%) | 36–37 (49,3%) | 3 |
| 5 | Elena Dementieva | 2–6, 4–6 | 3–6, 2–6 | | 3–6, 7–6$^{(8–6)}$, 6–2 | 1–2 | 2–5 (28,6%) | 27–38 (41,5%) | 4 |
| 7 | Venus Williams | 7–5, 4–6, 6–7$^{(4–7)}$ | 6–2, 6–7$^{(3–7)}$, 6–4 | 6–3, 6–7$^{(6–8)}$, 2–6 | | 1–2 | 4–5 (44,4%) | 49–47 (51%) | 2 |
Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-players-ties, head-to-head records; 4. in three-players-ties, percentage of sets won, or of games won; 5. steering-committee decision.