When did the venue for the Romero vs Whittaker UFC 213 fight open?
UFC 213: UFC 213: Romero vs. Whittaker was a mixed martial arts event produced by the Ultimate Fighting Championship held on July 8, 2017, at T-Mobile Arena in Paradise, Nevada, part of the Las Vegas metropolitan area. T-Mobile Arena:  Opened on April 6, 2016, the arena is a joint venture between MGM Resorts International and the Anschutz Entertainment Group.
i don't know