- Born on December 18, 1995 in Brno, Czech Republic, Krejcikova started playing tennis at 6 but up until the 2021 French Open she was known mostly as a doubles player.
- A former world No 1 in women's doubles, she partnered with Katerina Siniakova to two Grand Slam titles at Roland-Garros and Wimbledon in 2018.
- Krejcikova has also had plenty of success in mixed doubles, winning three Australian Open titles - two with Rajeev Ram (2019 and 2021) and one with Nikola Mektic (2020)
- Krejcikova was ranked junior world No. 3 in October, 2013. In that year, she won the girls' doubles titles at the French Open, at Wimbledon and the US Open with fellow Czech Katerina Siniakova.