Here's a guide to everything you need to know about UFC 253: Israel Adesanya vs. Paulo Costa, including fight times and how to watch. Israel Adesanya will step into Octagon on Saturday night, looking to defend his middleweight title for the second time, against Paulo Costa in the main event of UFC 253 on 'Fight Island' from the Flash Forum at Yas Island, Abu Dhabi. The fight marks the first time since UFC 98, when Lyoto Machida knocked out Rashad Evans to win the light heavyweight strap, that two unbeaten male fighters will battle it for a title. The animosity between Adesanya and Costa runs deep, punctuated by the heated confrontation on Friday in their last face-to-face encounter in which both guys had to be separated by security officers. Adesanya has competed once in 2020, at UFC 248, defeating Yoel Romero by unanimous decision to successfully defend the title for the first time. Costa steps into the Octagon for the first time since UFC 241 in August 2019, beating Romero by unanimous decision in an all-action contest. Whoever emerges with the belt at the end of UFC 253 becomes the best middleweight in the world. Here is everything you need to know about how to watch UFC 253, including channels, pay-per-view prices and fight times. UFC 253: TV channel, live stream for Adesanya vs. CostaUnited StatesThe early prelims (7 p.m ET) are on UFC Fight Pass, ESPN2, ESPN Deportes and ESPN+. The prelims (8 p.m.) continue on ESPN2, ESPN Deportes and ESPN+, followed by the ESPN+ main card pay-per-view at 10 p.m. ET. CanadaThe early prelims are on TSN and UFC Fight Pass, the prelims are on TSN and RDS, and the PPV main card is available on Bell, Rogers, Shaw, SaskTel, Videotron, Telus, Eastlink, and UFC PPV on UFC Fight Pass. AustraliaThe early prelims (8 a.m. AEST Sunday) are on UFC Fight Pass, the prelims (10 a.m. AEST Sunday) are on UFC Fight Pass and ESPN, and the PPV main card (12 p.m. AEST Sunday) is on Main Event, Fetch TV, and UFC PPV on UFC Fight Pass. BrazilBoth the prelims (7 p.m. BRT) and main card (11 p.m. BRT) are on Combate. GermanyThe early prelims (12:30 a.m. CEST Sunday) and prelims (2 a.m. CEST Sunday) are on UFC Fight pass.