The thing is sordi doesn't get ko he gets tko'd which is very different. He's never been flat out knocked unconscious in 34 fights. To beat Sordi you have to wear him down and smash him with better conditioning, this is where monte falls short. Sordi's lost to Cory is not surprising, Cory is a solid fighter who fought solid competition early in his career so his record is deceiving. Cory has better conditioning than Sordi. he beat Khalil Roundtree in TUF, so his 9-4 record can make you think he sucks, but he is actually a solid fighter.
Monte on the other hand doesn't have the conditioning , he has that bulky frame that's good for one round but once you get to the later rounds, he gasses out. Watching a recent fight he had against a can crusher who was 14-3 against 0-0 0-7 4-4 local brazilian cab drivers, here he is losing top position, and struggling to put him away till the third round.
That is a massive leap in competition fighting in low level mma in brazil( not even the jungle fights which is at least mid level mma) to fighting a pfl tournament winner, who's been around the mma game this long. I think sordi will spark him in round 1. He nearly beat Shoeface, out struck him and thwarted his submission attempts. Which tells your that Sordi is probably a black belt or Brown belt bjj at the very least to be able to avoid Antonio's bjj offense. Monte losing fast as he did and getting dropped by Antonio early is all you need to know about his skill level and this mismatch. Sordi's going to stay behind the jab and move and pace himself right, i give Monte a small window for a flash ko in the first two minutes, but even that is unlikely.
Sordi beat Chris Cammozi last year and had a competitive fight with Antonio, to go from that to losing to a low level regional fighter from brazil , i'd take a break from betting if he losses, out of pure shock and horror.