If there would've been atleast 10-15s left in the first round Perrira would've been out of there, he was pretty much knocked out on his feet but it was the end of the round. Izzy leg was not compromised in the 4th which was where he really lost the fight. Alex played took the entire round off and izzy didn't take force the issue and figured he could coast in the 5th round.Perriera is bigger and stronger, he forced Izzy into that position. Izzy's calf was compromised from early on and also shortly after he did the rollback. Izzy gave credits to Alex for checking those kicks.
It must be noted that Perriera was close to 30 lb heaver after the weight in. Perriera comes from the light heavyweight division as a kickboxer. So was his first MMA fight, which he lost. Dane stated that Alex is like a heavyweight when he's not in the train camp.
Perriera must have been, let me do cutting in MMA as I did with kickboxing and win all them matches. I think the next generation of fighters are going to be like Perriera, cutting down on weight for the fight and naturally being in a higher weight. He's actually a heavy light heavyweight.
Alex conserved his energy and pressed even more and izzy got saved by the ref. Because izzy defended the belt for so long he will get the rematch but I'm not sure I like his chances. I give usman a better chance than him.