US Open Women Singles

Emma Raducanu, of Great Britain, returns a shot to Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, reacts after defeating Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Belinda Bencic, of Switzerland, returns a shot to Emma Raducanu, of Great Britain, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, reacts after scoring a point against Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, returns a shot to Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, reacts after defeating Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Belinda Bencic, of Switzerland, returns a shot to Emma Raducanu, of Great Britain, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, reacts after defeating Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, returns a shot to Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, reacts after defeating Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)

Emma Raducanu, of Great Britain, returns a shot to Belinda Bencic, of Switzerland, during the quarterfinals of the US Open tennis championships, Wednesday, Sept. 8, 2021, in New York. (AP Photo/Elise Amendola)