Doubles
2021 WTA Finals
Final
Champions	Barbora Krejčíková Kateřina Siniaková
Runners-up	Hsieh Su-wei Elise Mertens
Score	6–3, 6–4
Details
Draw	8 (round robin)
Events
Singles Doubles
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Barbora Krejčíková and Kateřina Siniaková defeated Hsieh Su-wei and Elise Mertens in the final, 6–3, 6–4 to win the doubles tennis title at the 2021 WTA Finals.

Tímea Babos and Kristina Mladenovic were the two-time reigning champions, but failed to qualify this year.^[1]

Krejčíková and Siniaková clinched the year-end no. 1 as a team with their win against Sharon Fichman and Giuliana Olmos in their first round-robin match, and Siniaková secured the individual year-end no. 1 ranking by winning the title. Hsieh was also in contention for the top ranking. Krejčíková was the only player in this edition to qualify for both the singles and doubles tournaments.^[2]

	Semifinals							Final
	1	Barbora Krejčíková Kateřina Siniaková	3	6	[10]
	4	Nicole Melichar-Martinez Demi Schuurs	6	3	[6]
								1	Barbora Krejčíková Kateřina Siniaková	6	6
								3	Hsieh Su-wei Elise Mertens	3	4
	2	Shuko Aoyama Ena Shibahara	2	2
	3	Hsieh Su-wei Elise Mertens	6	6

		Krejčíková Siniaková	Hsieh Mertens	Guarachi Krawczyk	Fichman Olmos	RR W–L	Set W–L	Game W–L	Standings
1	Barbora Krejčíková Kateřina Siniaková		6–3, 6–1	5–7, 7–6(7–3), [10–7]	6–4, 6–1	3–0	6–1 (86%)	37–22 (63%)	1
3	Hsieh Su-wei Elise Mertens	3–6, 1–6		7–6(7–3), 6–2	6–4, 7–6(7–3)	2–1	4–2 (67%)	30–30 (50%)	2
6	Alexa Guarachi Desirae Krawczyk	7–5, 6–7(3–7), [7–10]	6–7(3–7), 2–6		0–6, 6–3, [11–9]	1–2	3–5 (38%)	28–35 (44%)	3
8	Sharon Fichman Giuliana Olmos	4–6, 1–6	4–6, 6–7(3–7)	6–0, 3–6, [9–11]		0–3	1–6 (14%)	24–32 (43%)	4

		Aoyama Shibahara	Melichar-Martinez Schuurs	Stosur Zhang	Jurak Klepač	RR W–L	Set W–L	Game W–L	Standings
2	Shuko Aoyama Ena Shibahara		6–4, 7–6(7–5)	6–4, 3–6, [7–10]	6–0, 6–4	2–1	5–2 (71%)	34–25 (58%)	1
4	Nicole Melichar-Martinez Demi Schuurs	4–6, 6–7(5–7)		6–2, 6–2	6–4, 3–6, [10–2]	2–1	4–3 (57%)	32–27 (54%)	2
5	Samantha Stosur Zhang Shuai	4–6, 6–3, [10–7]	2–6, 2–6		7–6(12–10), 6–7(4–7), [5–10]	1–2	3–5 (38%)	28–35 (44%)	4
7	Darija Jurak Andreja Klepač	0–6, 4–6	4–6, 6–3, [2–10]	6–7(10–12), 7–6(7–4), [10–5]		1–2	3–5 (38%)	28–35 (44%)	3

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.

• Doubles Draw