In this photo provided by the New York Stock Exchange, U.S. Open tennis women's singles champion Emma Raducanu, right, of Britain, visits the New York Stock Exchange and tours the trading floor Tuesday, Sept. 14, 2021, in New York. (Nicole Pereira/New York Stock Exchange via AP)

Emma Raducanu, of Britain, reacts after defeating Leylah Fernandez, of Canada, during the women's singles final of the US Open tennis championships, Saturday, Sept. 11, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu attends The Metropolitan Museum of Art's Costume Institute benefit gala celebrating the opening of the "In America: A Lexicon of Fashion" exhibition on Monday, Sept. 13, 2021, in New York. (Photo by Evan Agostini/Invision/AP)

Emma Raducanu, of Britain, poses outside Arthur Ashe Stadium with the championship trophy after she defeated Leylah Fernandez, of Canada, in the women's singles final of the US Open tennis championships, Saturday, Sept. 11, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Britain, reacts after scoring a point against Leylah Fernandez, of Canada, during the women's singles final of the US Open tennis championships, Saturday, Sept. 11, 2021, in New York. (AP Photo/Frank Franklin II)