Pablo Carreno Busta, of Spain, reacts while playing Dominik Koepfer, of Germany, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Pablo Carreno Busta, of Spain, tries to keep cool between games against Dominik Koepfer, of Germany, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Dominik Koepfer, of Germany, reacts while playing Pablo Carreno Busta, of Spain, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Dominik Koepfer, of Germany, plays Pablo Carreno Busta, of Spain, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Pablo Carreno Busta, of Spain, tries to keep cool between games against Dominik Koepfer, of Germany, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Pablo Carreno Busta, of Spain, plays Dominik Koepfer, of Germany, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

Pablo Carreno Busta, of Spain, tries to keep cool between games against Dominik Koepfer, of Germany, during the third round of the tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)