With Conor McGregor and Khabib Nurmagomedov butting heads on social media, one of the most infamous feuds in MMA history has been reignited.  The Irishman takes any opportunity to fire shots at a man many believe to be the biggest rival throughout his career. Despite fighting just once, the pair have had over a decade of history, dating back to 2015, when the noise of ‘The Notorious’ moving up to lightweight began to gain traction. Since then, the heat between two of the UFC’s biggest ever stars has only escalated.