Karolina Pliskova, of the Czech Republic, prepares to serve to Alize Cornet, of France, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karolina Pliskova, of the Czech Republic, serves to Alize Cornet, of France, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karolina Pliskova, of the Czech Republic, returns to Alize Cornet, of France, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karolina Pliskova, of the Czech Republic, returns to Alize Cornet, of France, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Karolina Pliskova, of the Czech Republic, prepares to serve to Alize Cornet, of France, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)