2021 French Open – Women's Doubles

Barbora Krejčíková and Kateřina Siniaková won the Women's Doubles title at the 2021 French Open, defeating Bethanie Mattek-Sands and Iga Świątek in the final, 6–4, 6–2. This was their second French Open title together, following their win in 2018, and was their third Grand Slam title as a pair. By winning the title, Krejčíková regained the WTA no. 1 doubles ranking from Kristina Mladenovic. Mladenovic and Hsieh Su-wei were also in contention for the ranking at the beginning of the tournament, but Hsieh lost in the third round.

2021 French Open – Women's Doubles

Barbora Krejčíková and Kateřina Siniaková won the Women's Doubles title at the 2021 French Open, defeating Bethanie Mattek-Sands and Iga Świątek in the final, 6–4, 6–2. This was their second French Open title together, following their win in 2018, and was their third Grand Slam title as a pair. By winning the title, Krejčíková regained the WTA no. 1 doubles ranking from Kristina Mladenovic. Mladenovic and Hsieh Su-wei were also in contention for the ranking at the beginning of the tournament, but Hsieh lost in the third round.