Which discipline did Barbora Krejčíková win at the 2021 WTA Finals?
Singles
Doubles
Mixed Doubles
All of the above
Answer
Barbora Krejčíková won the doubles discipline at the 2021 WTA Finals. She partnered with Katerina Siniakova to defeat Hsieh Su-wei and Elise Mertens in the final. This was Krejčíková's second WTA Finals title, having also won the singles title in 2019.
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