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LONDON, ENGLAND - MARCH 30: UFC Featherweight Champion Jose Aldo of Brazil (L) stares down title challenger Conor McGregor of Ireland during the UFC 189 World Championship Press Tour press conference on March 30, 2015 in London, England. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)

LONDON, ENGLAND - MARCH 30:  UFC Featherweight Champion Jose Aldo of Brazil (L) stares down title challenger Conor McGregor of Ireland during the UFC 189 World Championship Press Tour press conference on March 30, 2015 in London, England. (Photo by Jeff Bottari/Zuffa LLC/Zuffa LLC via Getty Images)