New UFC champ McGregor tells Irish fans: 'I've done this for us'

Conor McGregor floored Chad Mendes with just three seconds left in the second round to be crowned interim featherweight champion at a memorable UFC 189 in Las Vegas overnight.

A brilliant right-left punch combination from the Dubliner sent Mendes to the canvas, proving to be the pivotal moment of an enthralling main event that saw the more-experienced Californian use his wrestling prowess to very good effect with some big takedowns and dominant grappling.