I think Costa will KO Romero in round 2. IIRC, during the 2nd Whittaker fight, Yoel barely threw anything in the 1st round and I think even in the 2nd he was still hesitant. He was eating a lot of shots from Whittaker during those initial 2 rounds. I think Costa will be able to exploit Yoel's inactivity, he just has a lot of power and really great shot selection, if Costa was in Whittakers position, he would have KO'd Romero IMO. Just a hunch but I think that if Yoel doesn't get to work quickly and doesn't go for a few takedowns, he will lose the fight.