UFC 221: Romero vs. Rockhold (Feb 11, 2018) was a landmark event held at Perth Arena, marking the UFC's first visit to Western Australia after the lift of a cage-fighting ban. The main event featured Yoel Romero and Luke Rockhold for the interim Middleweight Championship. However, Romero missed weight, making him ineligible for the title despite his eventual 3rd-round KO victory. The event set a venue record for sports revenue and established top contenders in the division.