FILE - In this Saturday, May 22, 2021 filer photo, I taly's Gregorio Paltrinieri competes during the men's 1500 meters freestyle finals at the European Aquatics Championships in Duna Arena in Budapest, Hungary. Italian swimmer Gregorio Paltrinieri has contracted mononucleosis, raising questions over whether he’ll be able to defend his gold medal in the 1,500-meter freestyle at the Tokyo Olympics. “We’re obviously upset because his Olympic preparations were proceeding perfectly,” Italian Swimming Federation president Paolo Barelli said Wednesday. “But Paltrinieri is a phenomenal champion and will battle down to the last meter to win the medals he’s dreaming about for Tokyo.” (AP Photo/Petr David Josek, File)

FILE - In this Tuesday, July 23, 2019 file photo, Italy's Gregorio Paltrinieri reacts after his heat of the men's 800m freestyle at the World Swimming Championships in Gwangju, South Korea. Italian swimmer Gregorio Paltrinieri has contracted mononucleosis, raising questions over whether he’ll be able to defend his gold medal in the 1,500-meter freestyle at the Tokyo Olympics. “We’re obviously upset because his Olympic preparations were proceeding perfectly,” Italian Swimming Federation president Paolo Barelli said Wednesday. “But Paltrinieri is a phenomenal champion and will battle down to the last meter to win the medals he’s dreaming about for Tokyo.” (AP Photo/Lee Jin-man, File)