With unique access, the Sky Original “Klitschko: The Hardest Fight” tells the story of former heavyweight boxing world champion Vitali Klitschko and his brother Wladimir, who together dominated their sport…

Klitschko tells the captivating story of the boxing worlds most famous brothers: Vitali and Wladimir Klitschko. From the socialist drill of their childhood in the Ukraine, and their first successes…