New UFC Interim Lightweight Champion Tony Ferguson has called out the Conor McGregor to defend or vacate his undisputed Lightweight belt.
Ferguson become McGregor's number one contender after a third-round submission of Kevin Lee in the main event at UFC 216 in Las Vegas.
"Where you at McNuggets?" he said.
"I'm going to kick your arse.
"Defend or vacate motherf****r."
Despite Ferguson now holding the Interim belt which usually would stipulate he will now face the Champion next, McGregor who last fought in a Boxing bout against Floyd Mayweather last month, recently said he would rather a trilogy fight with Nate Diaz.