Elina Svitolina, of the Ukraine, plays Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Maria Sakkari, of Greece, plays Elina Svitolina, of the Ukraine, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Maria Sakkari, of Greece, reacts while playing Elina Svitolina, of the Ukraine, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, reacts while playing against Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Maria Sakkari, of Greece, reacts to a call while playing Elina Svitolina, of the Ukraine, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Maria Sakkari, of Greece, plays Elina Svitolina, of the Ukraine, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, plays Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, plays Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Maria Sakkari, of Greece, plays Elina Svitolina, of the Ukraine, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Maria Sakkari, of Greece, reacts while playing Elina Svitolina, of the Ukraine, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, plays Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, reacts while playing Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, plays Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, reacts after winning the second set playing against Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, plays Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, reacts after defeating Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, reacts while playing Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Elina Svitolina, of the Ukraine, reacts after defeating Maria Sakkari, of Greece, during the third round of the tennis competition at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)