Undisputed heavyweight boxing champion Oleksandr Usyk has thrown down a different kind of challenge-this time, not in the ring but on the world stage.

The Ukrainian fighter has called on U.S.

President Donald Trump to witness firsthand the harsh realities of war by spending a week in Ukraine." President Trump, open your eyes.

Please stop the war in Ukraine," Usyk pleaded during a recent interview with the BBC and Piers Morgan.