#Conor McGregor blasts #Khabib Nurmagomedov's 'lack of courage' and claims rival is running scared from rematch as Irishman vows to 'put on flawless clinic' and 'bust up' Dustin Poirier in UFC 257 showdown.

#Conor McGregor blasts #Khabib Nurmagomedov's 'lack of courage' and claims rival is running scared from rematch as Irishman vows to 'put on flawless clinic' and 'bust up' Dustin Poirier in UFC 257 showdown.