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. 25 in singles, and No. 42 in doubles. 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 compatriot and fellow teenager Caty McNally. Gauff rose to prominence with an upset win over Venus Williams in the opening round at Wimbledon in 2019.
Born to athletic 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.
Gauff had success as a junior, earning a sponsorship to train at Patrick Mouratoglou's academy in France. She began playing on the ITF Junior Circuit at 13 and finished runner-up at the junior 2017 US Open in just her fourth ITF event, the youngest finalist in the tournament's history. She became the No. 1 junior in the world after winning the junior Grand Slam singles title over McNally at the 2018 French Open. She also won a junior Grand Slam doubles title at the 2018 US Open, this time partnering with McNally.
Gauff made her WTA Tour debut in March 2019 at the Miami Open and won her opening match. She received a wildcard into the qualifying draw at the 2019 Wimbledon Championships where she became the youngest player in the tournament's history to qualify for the main draw. She reached the fourth round, and each of her matches was the most-watched of the day in the United States. Gauff reached the third round of the 2019 US Open, the fourth round of the 2020 Australian Open and the quarterfinal of the 2021 French Open.