Naomi Osaka, of Japan, waves to the crowd after defeating Hailey Baptiste, of the United States, during the second round of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, reacts after scoring a point against Hailey Baptiste, of the United States, during the second round of the U.S. Open tennis championships.

Hailey Baptiste, of the United States, returns a shot to Naomi Osaka, of Japan, during the second round of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, reacts after scoring a point against Hailey Baptiste, of the United States, during the second round of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, returns a shot to Hailey Baptiste, of the United States, during the second round of the U.S. Open tennis championships in New York.

Hailey Baptiste, of the United States, can't make the return on a shot from Naomi Osaka, of Japan, during the second round of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, returns a shot to Hailey Baptiste, of the United States, during the second round of the U.S. Open tennis championships in New York.

Naomi Osaka, of Japan, returns a shot to Hailey Baptiste, of the United States, during the second round of the U.S. Open tennis championships in New York.