Zelenskyy said he had spoken to Ukraine's Olympians and thanked everyone "who helps Ukraine maintain as many elements of normal life as possible".
Ukraine has lobbied hard, since the Kremlin's February 2022 invasion, to ensure athletes from Russia and from Belarus, the Kremlin's close ally, were barred from taking part in Paris.
Only about 15 Russian athletes will be competing as neutrals, with no flags or anthems permitted and all were subjected to vetting to ensure they had no connection with the Russian military.
Russian officials complained that the restrictions were unfair and discriminatory and several athletes turned down offers to compete as neutrals.
In his remarks, Zelenskiy said Russian President Vladimir Putin's actions "have made it so that the only Russian sport today is the killing of people.
"And the world will never tolerate this. Russia must lose in this war and lose in this terror. Then life will be the winner. And we are doing everything with this in mind."
Published 24 July 2024, 19:42 IST