Belinda Bencic, of Switzerland, servers during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Viktorija Golubic, of Switzerland, returns a shot during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, of the Czech Republic, serves during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Belinda Bencic and Viktorija Golubic, of Switzerland, react during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Belinda Bencic, of Switzerland, serves during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Katerina Siniakova, left, of the Czech Republic, returns a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Katerina Siniakova, of the Czech Republic, returns a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, of the Czech Republic, reaches for a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Katerina Siniakova, of the Czech Republic, returns a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Katerina Siniakova, of the Czech Republic, reacts during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Belinda Bencic, of Switzerland, returns a shot during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, of the Czech Republic, serves during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Belinda Bencic and Viktorija Golubic, of Switzerland, react during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, react during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Belinda Bencic, of Switzerland, serves during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Belinda Bencic, of Switzerland, waits to serve during the women's doubles gold medal match of the tennis competition against the Czech Republic eat the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, celebrate after winning the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Barbora Krejcikova, of the Czech Republic, reacts during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, are hugged by Belinda and Viktorija Golubic, of Switzerland, following the women's doubles gold medal match of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. Krejcikova and Siniakova won the match. (AP Photo/Seth Wenig)

Barbora Krejcikova, of the Czech Republic, serves during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Viktorija Golubic, of Switzerland, reaches for a shot during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, of the Czech Republic, returns a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, of the Czech Republic, returns a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, celebrate after winning the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, react during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, react during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Belinda Bencic and Viktorija Golubic, of Switzerland, react during the women's doubles gold medal match of the tennis competition against the Czech Republic at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Katerina Siniakova, of the Czech Republic, returns a shot during the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, pose with the gold medal in the women's doubles at the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, and Katerina Siniakova, middle, of the Czech Republic, pose with the gold medal in the women's doubles of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. Silver medalist Belinda Bencic and Viktorija Golubic, left, of Switzerland, and bronze medalist Luisa Stefani and Laura Pigossi, of Brazil, pose with the medals. (AP Photo/Seth Wenig)

Barbora Krejcikova, and Katerina Siniakova, middle, of the Czech Republic, pose with the gold medal in the women's doubles of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. Silver medalist Belinda Bencic and Viktorija Golubic, left, of Switzerland, and bronze medalist Luisa Stefani and Laura Pigossi, of Brazil, pose with the medals. (AP Photo/Patrick Semansky)

Belinda Bencic and Viktorija Golubic, of Switzerland, pose with the silver medal in the women's doubles of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova, and Katerina Siniakova, middle, of the Czech Republic, pose with the gold medal in the women's doubles of the tennis competition at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. Silver medalist Belinda Bencic and Viktorija Golubic, left, of Switzerland, and bronze medalist Luisa Stefani and Laura Pigossi, of Brazil, pose with the medals. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, celebrate after winning the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Patrick Semansky)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, celebrate after winning the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Barbora Krejcikova and Katerina Siniakova, of the Czech Republic, celebrate after winning the women's doubles gold medal match of the tennis competition against Switzerland at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)