Kateřina Siniaková (See-nyah-KOH-vah, born 10 May 1996) is a Czech professional tennis player who is the current world No. 1 in doubles. She is a three-time Grand Slam champion, having won the 2018 French Open, 2018 Wimbledon Championships and 2021 French Open in women’s doubles, alongside compatriot Barbora Krejčíková. Siniaková also finished runner-up in doubles at the 2017 US Open with Lucie Hradecká, and at the 2021 Australian Open and 2018 WTA Finals with Krejčíková. In singles, her best Grand Slam result was at the 2019 French Open, where she upset world No. 1, Naomi Osaka, en route to the fourth round. She has also reached the third round at a further five Grand Slam events.
Cori “Coco” Gauff (born March 13, 2004) is an American tennis player. She is the youngest player ranked in the top 100 by the Women’s Tennis Association (WTA) and has a career-high ranking of world No. 19 in singles achieved on 13 September 2021 and No. 17 in doubles achieved on 8 November 2021. Gauff won her first WTA singles title at the 2019 Linz Open at age 15, making her the youngest singles title-holder on the WTA Tour since 2004. She won three WTA doubles titles with Caty McNally. Gauff rose to prominence with a win over Venus Williams in the opening round at Wimbledon 2019. Born to parents with NCAA Division I collegiate backgrounds in basketball and track and field, Gauff experimented with a variety of sports as a child. She chose tennis, inspired by the Williams sisters and preferring an individual sport.