It began as a bitter rivalry, escalated into accusations of drug cheating, and now, threatens to blow up into diplomatic row. Olympic gold medallist Mack Horton has staged a powerful poolside protest at the World Swimming Championships in South Korea, after he was beaten by controversial Chinese competitor Sun Yang. Join Nine News for the latest in news and events that affect you in your local city, as well as news from across Australia and the world. Get more at: https://www.9news.com.au/ Follow Nine News on Facebook: https://www.facebook.com/9News/ Follow Nine News on Twitter: https://twitter.com/9NewsAUS Follow Nine News on Instagram: https://www.instagram.com/9news/ #9News #NineNewsAustralia #9NewsAUS