Answer
Barbora Krejčíková has finished as a runner-up at the WTA Finals in doubles twice. In 2019, she and partner Květa Peschke reached the final, where they lost to Ashleigh Barty and Demi Schuurs. In 2021, she and partner Kateřina Siniaková reached the final, where they lost to Hsieh Su-wei and Elise Mertens.