Caty McNally (born November 20, 2001) is an American professional tennis player who reached a career-high singles ranking of No. 50 and a best doubles ranking of No. 11. She is best known for her dynamic doubles partnership with Coco Gauff, nicknamed "McCoco" by fans, with whom she won three WTA titles and reached the final of the 2021 US Open. As a junior, she won the 2018 French Open doubles title with Iga Świątek and the US Open girls' doubles with Gauff, while also finishing runner-up to Gauff in the 2018 French Open girls' singles. Her professional breakthrough came in 2019 when she earned her first major win at the US Open, famously taking a set off Serena Williams, and reached her first WTA singles semifinal at the Washington Open. Beyond her partnership with Gauff, she reached another major final at the 2022 US Open with Taylor Townsend, and has accumulated nine WTA doubles titles and two WTA Challenger singles titles in her career. Coached by her mother, a former professional player, she hails from Cincinnati, Ohio, and has also won six ITF doubles and four ITF singles titles.