Watch Free Online HD Moviesjoy. UFC Fight Night 59: McGregor vs. Siver was a mixed martial arts event held on January 18, 2015, at the TD Garden in Boston, Massachusetts. The event was headlined by a featherweight bout between Conor McGregor and Dennis Siver. It was announced that a victory over Siver will ensure McGregor of a shot at the UFC Featherweight Championship in his next fight.