Russian athletes should publicly denounce the war if they are to be allowed to participate in the 2024 Olympics, Kyiv mayor and former world boxing champion Vitali Klitschko told AFP Monday. "Russian and Belarusian athletes can't participate in the Olympic Games in Paris if they don't say 'no' to war," Klitschko said. "If they publicly express against this war, they can (participate). But they're afraid," the former heavyweight boxer said. Russia and its ally Belarus, which allowed its territory to be used as a launchpad when Moscow began its invasion of Ukraine last February, have been sidelined from most Olympic sports since the war began.