Singles
2009 WTA Tour Championships
Final
Champion	Serena Williams
Runner-up	Venus Williams
Score	6–2, 7–6(7–4)
Details
Draw	8 (RR + elimination)
Seeds	8
Events
Singles Doubles
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Serena Williams defeated the defending champion, her sister Venus Williams, in the final, 6–2, 7–6^(7–4) to win the singles title at the 2009 WTA Tour Championships. It was her second Tour Finals singles title.

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.

	Semifinals							Final
	8	Jelena Janković	7	3	4
	7	Venus Williams	5	6	6
								7	Venus Williams	2	64
								2	Serena Williams	6	77
	2	Serena Williams	6	0
	4	Caroline Wozniacki	4	1r

		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.

		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.

• WTA Tour Championships appearances

• Draw