Martial arts: UFC chief refutes McGregor claim

Ultimate Fighting Championship president Dana White has refuted a claim by Irish superstar Conor McGregor that a deal had been brokered to see him fight Nate Diaz in a rematch in July.

Featherweight champion McGregor had stunned the mixed martial arts world last week by announcing his "retirement" before later backtracking.

The UFC responded by removing the 27-year-old from the billing for his July 9 fight with Diaz on the UFC 200 card in Las Vegas.

However McGregor insisted in a tweet on Monday that he was back on the card and looking forward to fighting.

But in an interview with the TMZ sports website, White said he was baffled by McGregor's announcement.