Chinese swimmer Sun Yang banned again, misses Tokyo Olympics
FILE - In this Thursday, July 25, 2019 file photo, China's Sun Yang swims during a warm up session at the World Swimming Championships in Gwangju, South Korea. Chinese swimmer star Sun Yang has been banned for more than four years for breaking anti-doping rules. The verdict by the Court of Arbitration for Sport ends Sun’s hopes of defending his Olympic title in the 200 meters freestyle in Tokyo next month. His ban expires in May 2024. (AP Photo/Mark Schiefelbein, File)

FILE - In this Thursday, July 25, 2019 file photo, China's Sun Yang swims during a warm up session at the World Swimming Championships in Gwangju, South Korea. Chinese swimmer star Sun Yang has been banned for more than four years for breaking anti-doping rules. The verdict by the Court of Arbitration for Sport ends Sun’s hopes of defending his Olympic title in the 200 meters freestyle in Tokyo next month. His ban expires in May 2024. (AP Photo/Mark Schiefelbein, File)

Jun. 22, 2021 11:19 AM EDT
FILE - In this July 26, 2019, file photo, China's Sun Yang leaves the pool deck following the men's 4x200m freestyle relay heats at the World Swimming Championships in Gwangju, South Korea. Chinese swimmer star Sun Yang has been banned for more than four years for breaking anti-doping rules. The verdict by the Court of Arbitration for Sport ends Sun’s hopes of defending his Olympic title in the 200 meters freestyle in Tokyo next month. His ban expires in May 2024. (AP Photo/Mark Schiefelbein, File)

FILE - In this July 26, 2019, file photo, China's Sun Yang leaves the pool deck following the men's 4x200m freestyle relay heats at the World Swimming Championships in Gwangju, South Korea. Chinese swimmer star Sun Yang has been banned for more than four years for breaking anti-doping rules. The verdict by the Court of Arbitration for Sport ends Sun’s hopes of defending his Olympic title in the 200 meters freestyle in Tokyo next month. His ban expires in May 2024. (AP Photo/Mark Schiefelbein, File)

Jun. 22, 2021 11:17 AM EDT
FILE - In this Tuesday, July 23, 2019 file photo, China's Sun Yang celebrates after winning the men's 200m freestyle final at the World Swimming Championships in Gwangju, South Korea. Chinese swimmer star Sun Yang has been banned for more than four years for breaking anti-doping rules. The verdict by the Court of Arbitration for Sport ends Sun’s hopes of defending his Olympic title in the 200 meters freestyle in Tokyo next month. His ban expires in May 2024. (AP Photo/Lee Jin-man, File)

FILE - In this Tuesday, July 23, 2019 file photo, China's Sun Yang celebrates after winning the men's 200m freestyle final at the World Swimming Championships in Gwangju, South Korea. Chinese swimmer star Sun Yang has been banned for more than four years for breaking anti-doping rules. The verdict by the Court of Arbitration for Sport ends Sun’s hopes of defending his Olympic title in the 200 meters freestyle in Tokyo next month. His ban expires in May 2024. (AP Photo/Lee Jin-man, File)

Jun. 22, 2021 11:44 AM EDT