Czech Republic's Tomas Machac in action against Norway's Casper Ruud during their men's singles match on day two of the Australian Open tennis tournament in Melbourne on January 17, 2023. (Photo by Hannah Mckay/Reuters)

Bradie, a corgi, competes in the dock dive competition during the 147th Westminster Kennel Club Dog show, Saturday, May 6, 2023, at the USTA Billie Jean King National Tennis Center in New York. (Photo by Mary Altaffer/AP Photo)

Russia's Andrey Rublev reacts against Australia's Alex De Minaur during their men's singles match on day eight of the Australian Open tennis tournament in Melbourne on January 21, 2024. (Photo by Martin Keep/AFP Photo)

Japan's Naomi Osaka sits with her towel over her head during a break in her third round loss to Coco Gauff of the U.S. at the Australian Open tennis championship in Melbourne, Australia, Friday, January 24, 2020. (Photo by Lee Jin-man/AP Photo)

John McEnroe kicks back a television camera that he felt was crowding him on the court during the finals of the U.S. Pro Indoor Tennis Championships in Philadelphia January 27, 1985. McEnroe defeated Czech Miroslav Mecir to win the tournament. (Photo by Amy Sancetta/AP Photo)

Japan's Naomi Osaka returns the ball during her match against Slovakia's Dominika Cibulkova during the Madrid Open tennis tournament, Sunday, May 5, 2019, in Madrid, Spain. (Photo by Andrea Comas/AP Photo)

Belgium's Elise Mertens, left, and Aryna Sabalenka of Belarus celebrate with their trophy after defeating Barbora Krejcikova and Katerina Siniakova of the Czech Republic in the women's doubles final at the Australian Open tennis championship in Melbourne, Australia, Friday, February 19, 2021. (Photo by Hamish Blair/AP Photo)

Girls practice sit-ups during gymnastics lessons at the Shanghai Yangpu Youth Amateur Athletic School in Shanghai, China, on May 4, 2016. China's sports system has been enormously successful since the country returned to the Olympic fold in 1980, culminating with the host nation topping the medals' table at the 2008 Beijing Olympics. And yet, with the Rio de Janeiro Games less than three months away, the system is beginning to break down due to the shifting demographics of a more prosperous nation. (Photo by Aly Song/Reuters)