Former UFC lightweight champion Charles Oliveira faces fellow ranked contender Mateusz Gamrot in the main event of UFC Fight Night in Rio de Janeiro on Saturday (7 p.m. ET on ESPN+, prelims at 4 p.m. ET).

Oliveira (35-11, 1 NC) last fought in June in an unsuccessful bid to regain the title, losing to Ilia Topuria by first-round knockout. Oliveira, a Brazilian who has yet to lose in five previous UFC bouts in his home country, is No. 3 in the ESPN lightweight rankings .

The ninth-ranked Gamrot (25-3, 1 NC) has won four of his past five fights, most recently a unanimous decision over Ludovit Klein in May.

ESPN MMA analysts Din Thomas and Anthony Smith provide their main event predictions, and ESPN betting expert Ian Parker adds insight on the value bets available on the fight ca

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