Elina Svitolina, of Ukraine, serves to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Laura Siegemund, of Germany, serves to Elina Svitolina, of Ukraine, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Laura Siegemund, of Germany, serves to Elina Svitolina, of Ukraine, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Laura Siegemund, of Germany, returns to Elina Svitolina, of Ukraine, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, serves to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Elina Svitolina, of Ukraine, returns to Laura Siegemund, of Germany, during the tennis competition at the 2020 Summer Olympics, Sunday, July 25, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)