John Peers, of Australia, right, watches as Ashleigh Barty returns a shot during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

John Peers, of Australia, left, keeps low as Ashleigh Barty serves during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

The Australian doubles team of John Peers, right, and Ashleigh Barty play during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

The Australian doubles team of John Peers, right, and Ashleigh Barty play during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

The Australian doubles team of John Peers, right, and Ashleigh Barty celebrate during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

The Australian doubles team of John Peers, right, and Ashleigh Barty celebrate during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)

The Argentine doubles team of Nadia Podoroska, left, and Horacio Zeballos talk during the first round of the mixed doubles tennis competition at the 2020 Summer Olympics, Wednesday, July 28, 2021, in Tokyo, Japan. (AP Photo/Seth Wenig)