Ukraine could soon have a comedian as its president. Volodymyr Zelenskiy hasn't held political office before but when people go to the polls he's the clear favourite to beat the man currently in the job, Petro Poroshenko. The two contenders took part in a televised debate at the Olympic Stadium in Kiev. Sky correspondent Diana Magnay reports from Kiev. SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews Follow us on Twitter: https://twitter.com/skynews and https://twitter.com/skynewsbreak Like us on Facebook: https://www.facebook.com/skynews Follow us on Instagram: https://www.instagram.com/skynews For more content go to http://news.sky.com and download our apps: Apple https://itunes.apple.com/gb/app/sky-news/id316391924?mt=8 Android https://play.google.com/store/apps/details?id=com.bskyb.skynews.android&hl=en_GB