| Doubles | ||||
|---|---|---|---|---|
| 2018 WTA Finals | ||||
| Final | ||||
| Champions | ||||
| Runners-up | ||||
| Score | 6–4, 7–5 | |||
| Details | ||||
| Draw | 8 | |||
| Seeds | 4 | |||
| Events | ||||
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Defending championTímea Babos and her partnerKristina Mladenovic defeatedBarbora Krejčíková andKateřina Siniaková in the final, 6–4, 7–5 to win the doubles tennis title at the 2018 WTA Finals.
Babos andAndrea Sestini Hlaváčková were the reigning champions, but did not qualify together this year. Sestini Hlaváčková partneredBarbora Strýcová, but was defeated in the semifinals by Krejčíková and Siniaková.
Krejčiková and Siniaková secured the joint-year-endworld No. 1 ranking by reaching the final. Babos and Mladenovic, alongside Strýcová, were also in contention for the year-end top ranking.
Key