Amanda Anisimova, of the United States, reacts after defeating Naomi Osaka, of Japan, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Amanda Anisimova, of the United States, reacts after defeating Naomi Osaka, of Japan, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Amanda Anisimova, of the United States, reacts after defeating Naomi Osaka, of Japan, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, reacts after losing a point to Amanda Anisimova, of the United States, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Amanda Anisimova, of the United States, returns a shot to Naomi Osaka, of Japan, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, returns a shot to Amanda Anisimova, of the United States, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Amanda Anisimova, of the United States, returns a shot to Naomi Osaka, of Japan, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, returns a shot to Amanda Anisimova, of the United States, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Amanda Anisimova, of the United States, returns a shot to Naomi Osaka, of Japan, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, serves to Amanda Anisimova, of the United States, during the women's singles semifinals of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, plays Amanda Anisimova, of the United States, during the women's singles semifinals of the U.S. Open tennis championships in New York.