Perreria will move up to heavyweight, I don't know when that will be.
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I think so too. He's 37 and maybe has like 4-5 fights at the highest level left in him, so he probably wants to maximise the profit before retiring and won't be much interested in fighting some average fighters from light heavyweight.
His next opponent should be Ankalaev, assuming he beats Rakic. So Alex could either escape the Ankalaev fight by moving up to the heavyweight, or fight Ankalaev and then (if victorious) move up to fight either Jon Jones or Tom Aspinal. But if he was to lose to Ankalaev and move up, he unlikely would get a shot for the belt and would have to fight someone lower-ranked first.
Anyhow, there aren't many interesting options left for him in the light heavyweight. But then again, the UFC matched him up against Rountree, a fight that no one expected, so who knows what they will come up with next.
It was pretty obvious he was aiming for that and who does not want to get enough money from fights until he retires he is also aiming for a great career in the UFC to be included in the Hall of Fame for fighting a greater wrestler in this division would surely see if he can still maintain his composure but I guess that is why Glover Texeira was there for him to give him advice for his ground game because Alex Pereira's Standing is so great he just needed sparring partners that could elevate his performance even further his ground game also needs to improve I really think that if he can have an opponent that could test him with his ground defense then that will be a great thing for him and there will be no question that he is a well-rounded fighter,
But going into the Heavyweight division might be farfetched for now I think he can manage to do so or maybe getting 3 belts in the UFC might be possible for him.
The amazing part of Pereira vs Rountree fight was that is has lasted for 4 rounds 
With odds like 4.5+, Pereira should have chopped him down in first or second round. But the fight went till 4th round. Only fight against Izzy lasted till 5th round. All other opponents Pereira has finished in first and second rounds. For me this means that Rountree aint that easy opponent. Even though he lost, his value imho has increased. The second round was the best of Rountree. But, starting from third, I felt like Khalils gas tank started to leak heavily. What do you think? Am I the only one to notice that he turned extremely slow?
He can't because Rountree just dominated him in the first 2 round with his counter and knowing that he's a striker, I know that he can do that. It's just that, Pereira's power slowly got him in the 3rd round and got completely dominated in the 4th round. Rountree might have that speed to counter and power to strike Pereira, but Pereira's power is just too much hence, he slowly crumbled starting the 3rd round. What I believe though is that, Rountree got my respect because of this fight, and even though he lost, many of those fans cheered for him because nobody expected him to last 4 rounds knowing that he's up against one of the best currently. With odds like 4.5+, Pereira should have chopped him down in first or second round. But the fight went till 4th round. Only fight against Izzy lasted till 5th round. All other opponents Pereira has finished in first and second rounds. For me this means that Rountree aint that easy opponent. Even though he lost, his value imho has increased. The second round was the best of Rountree. But, starting from third, I felt like Khalils gas tank started to leak heavily. What do you think? Am I the only one to notice that he turned extremely slow? I agree Roundtree was dominant in the 1st 2 rounds he has the speed and even the chin to withstand the strike of Pereira it was Alex Pereira who was breathing heavily and was out of gas but still managed to get through because of his will to continue Roundtree was really a different person inside the ring and he has shown it in the fight that he can withstand a blow from Pereira that has a great knockout power so for me Khalil Roundtree is really dangerous and he got my respect.