Viewers guide: Undefeated rivals Adesanya, Costa perfect for 'Fight Island' showcase

Israel Adesanya is unbeaten, and so is Paulo Costa, going into their UFC middleweight title fight.

source https://www.espn.com/mma/story/_/id/29937972/ufc-253-viewers-guide-undefeated-rivals-adesanya-costa-perfect-fight-island-showcase