Defending champions Tímea Babos and Kristina Mladenovic defeated Hsieh Su-wei and Barbora Strýcová in the final, 6–1, 6–3 to win the doubles tennis title at the 2019 WTA Finals. It was Babos’ third straight title, as she also won in 2017 (partnering Andrea Sestini Hlaváčková).

Strýcová secured the year-end world No. 1 ranking by reaching the final. Aryna Sabalenka and Mladenovic were also in contention for the individual top ranking. The team of Babos and Mladenovic ended the year as the No. 1 doubles team.

The competition returned to a round-robin format for the first time since 2015.

	Semifinals							Final
	3	Tímea Babos Kristina Mladenovic	1	6	[10]
	7	Samantha Stosur Zhang Shuai	6	4	[8]
								3	Tímea Babos Kristina Mladenovic	6	6
								2	Hsieh Su-wei Barbora Strýcová	1	3
	8	Anna-Lena Grönefeld Demi Schuurs	1	2
	2	Hsieh Su-wei Barbora Strýcová	6	6

		Mertens Sabalenka	Babos Mladenovic	Chan Chan	Grönefeld Schuurs	RR W–L	Set W–L	Game W–L	Standings
1	Elise Mertens Aryna Sabalenka		6–4, 2–6, [5–10]	7–6(7–5), 6–4	5–7, 6–1, [7–10]	1–2	4–4 (50%)	32–30 (52%)	3
3	Tímea Babos Kristina Mladenovic	4–6, 6–2, [10–5]		6–2, 5–7, [10–6]	7–5, 6–2	3–0	6–2 (75%)	36–24 (60%)	1
5	Chan Hao-ching Latisha Chan	6–7(5–7), 4–6	2–6, 7–5, [6–10]		2–6, 4–6	0–3	1–6 (14%)	25–37 (40%)	4
8	Anna-Lena Grönefeld Demi Schuurs	7–5, 1–6, [10–7]	5–7, 2–6	6–2, 6–4		2–1	4–3 (57%)	28–30 (48%)	2

		Hsieh Strýcová	Dabrowski Xu	Krejčíková Siniaková	Stosur Zhang	RR W–L	Set W–L	Game W–L	Standings
2	Hsieh Su-wei Barbora Strýcová		6–2, 4–6, [9–11]	6–2, 1–6, [10–5]	6–4, 4–6, [10–5]	2–1	5–4 (56%)	29–27 (52%)	1
4	Gabriela Dabrowski Xu Yifan	2–6, 6–4, [11–9]		4–6, 2–6	6–4, 4–6, [5–10]	1–2	3–5 (38%)	25–33 (43%)	4
6	Barbora Krejčíková Kateřina Siniaková	2–6, 6–1, [5–10]	6–4, 6–2		3–6, 6–7(7–9)	1–2	3–4 (42%)	29–27 (52%)	3
7	Samantha Stosur Zhang Shuai	4–6, 6–4, [5–10]	4–6, 6–4, [10–5]	6–3, 7–6(9–7)		2–1	5–3 (63%)	34–30 (53%)	2

Standings are determined by: 1. number of wins; 2. number of matches; 3. in two-player ties, head-to-head records; 4. in three-player ties, (a) percentage of sets won (head-to-head records if two players remain tied), then (b) percentage of games won (head-to-head records if two players remain tied), then (c) WTA rankings.

• Main draw