Olympic Tournament Women Singles

Mona Barthel, of Germany, serves to Iga Swiatek, of Poland, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Iga Swiatek, of Poland, returns to Mona Barthel, of Germany, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Mona Barthel, of Germany, serves to Iga Swiatek, of Poland, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Mona Barthel, of Germany, serves to Iga Swiatek, of Poland, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Iga Swiatek, of Poland, serves to Mona Barthel, of Germany, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo. (AP Photo/Patrick Semansky)

Mona Barthel, of Germany, returns to Iga Swiatek, of Poland, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Iga Swiatek, of Poland, serves to Mona Barthel, of Germany, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Iga Swiatek, of Poland, left, returns to Mona Barthel, of Germany, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Iga Swiatek, of Poland, serves to Mona Barthel, of Germany, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo. (AP Photo/Patrick Semansky)

Mona Barthel, of Germany, prepares to serve to Iga Swiatek, of Poland, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Iga Swiatek, of Poland, prepares to serve to Mona Barthel, of Germany, during the tennis competition at the 2020 Summer Olympics, Saturday, July 24, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)