Barbora Krejčíková (Czech pronunciation: [ˈbarbora ˈkrɛjtʃiːkovaː]; born 18 December 1995) is a Czech professional tennis player. She has been ranked as high as world No. 2 in singles and world No. 1 in doubles by the WTA. Krejčíková has won nine singles, 20 doubles, and three mixed doubles titles at the WTA Tour level. She is known for her aggressive playing style and her smooth, powerful groundstrokes.
Krejčíková has won two singles majors (at the 2021 French Open and at the 2024 Wimbledon Championships) and seven women's doubles majors, including the career Golden Slam in women's doubles. Krejčíková won all seven of her women's doubles majors partnering with compatriot Kateřina Siniaková. She also won three mixed doubles majors, all at the Australian Open, for a combined total of 12 major titles. She is one of only four active players to have won a major in all three disciplines, alongside Venus Williams, Serena Williams and Jeļena Ostapenko. She won a major, in at least one of those three disciplines, for seven consecutive seasons from 2018 to 2024.
Alongside her major titles, Krejčíková won the 2021 WTA Finals and a gold medal at the 2020 Tokyo Olympics in women's doubles, both partnering Siniaková, and was part of the Czech team that won the 2018 Fed Cup. The pairing also finished runners-up at two WTA Finals and the 2021 Australian Open.
Krejčíková started playing tennis aged six. She later was coached and mentored by Jana Novotná. She played for TK Ivančice.
In October 2020, Krejčíková reached the fourth round of the French Open tournament, which helped her attain a new best year-end ranking of No. 65 in November.
In March 2021, Krejčíková made progress to her first singles final of a WTA 1000 tournament at the Dubai Championships, eventually losing to Garbiñe Muguruza. As a result, she climbed to a new career-high of No. 38 in the singles rankings.
In May 2021, Krejčíková won her first WTA singles title at Strasbourg the day before the 2021 French Open started. Krejčíková went on to win the subsequent French Open, her first Grand Slam title in singles. As a result, she climbed to a career-high of No. 15 in the singles rankings. She won her third WTA singles title at Prague, and reached a career high singles ranking of world No. 2 in February 2022 after reaching the final at Sydney and the quarterfinals of the 2022 Australian Open. After injuries, Krejčíková would win two further singles titles in 2022: at Tallinn, and at Ostrava.
In 2023, Krejčíková won her maiden WTA 1000 title in singles at the 2023 Dubai Tennis Championships, defeating four top-10 opponents, including the world Nos 1, 2, and 3.
In 2024, Krejčíková reached her second Grand Slam final at the 2024 Wimbledon Championships, defeating former champion Elena Rybakina. She won the title defeating Jasmine Paolini in three sets. It was her second singles Major title after the French Open in 2021.
With compatriot Kateřina Siniaková, Krejčíková won the doubles titles at the 2018 French Open and 2018 Wimbledon Championships.
Krejcikova also won the 2021 French Open women's doubles title with Siniaková, and they added the Australian Open Women's doubles 2022 title in January 2022.
The pair added the 2022 Wimbledon Championships title and completed the career grand slam with the doubles title in New York at the US Open.
Krejcikova has won three Grand Slam mixed doubles titles, winning the Australian Open for three years in a row from 2019 to 2021. With American partner Rajeev Ram, she won the mixed-doubles competition of the 2019 Australian Open. She succeeded in defending her title the following year alongside Nikola Mektić, and in 2021 again, with Rajeev Ram.
Additionally, Krejčíková has won six more doubles titles on the WTA Tour, one WTA 125K series doubles title, as well as 19 doubles titles on the ITF Circuit.
On 22 October 2018, Krejčíková reached No. 1 in the doubles rankings, jointly with Kateřina Siniaková. They were the fifth and sixth Czechs ranked No. 1 since 1975, and the 14th pair that attained the No. 1 together.
In August 2021, Krejcikova and Siniaková won the gold medal at the Tokyo Olympics in the women's doubles.
In November 2021, Krejčíková won the 2021 WTA Finals doubles title with Siniaková, their first title at the year-end championships.
Krejčíková was ranked junior world No. 3 in October 2013. In that year, she won the girls' doubles titles at the French Open, Wimbledon and the US Open with fellow Czech Kateřina Siniaková. Alongside Oleksandra Korashvili from Ukraine, she also reached the final of the Australian Open, falling one match shy of completing the calendar-year Grand Slam. The same year, she also won the European Junior Championship U18 in Klosters, Switzerland in singles and doubles.