Khabib simply told - "Islam is a champ, he must be ready for everyone. If King Kong fits in 170lb, bring him in" 
The champ isn't devastated after the match and his opponent shouldn't be moving like he received no damage. Don't you remember in what conditions Islam was compared to Volkanovski after the match? There are a lot of people who think that Volk was robbed and lots of people support rematch but it's bad that Volk has almost no time to prefer and he still took it, I hope he wins.I remember that people complained that Islam was out stamina and his team helped him to stand, while Volk was ready for more rounds. But that does not prove anything. All these talks about was or was not robbed are bs for me. Talks that your were more fresh, opponent had more damage on the face and etc. I was always saying that no one should let judges decide your faith. Either win before time runs out or accept what judges scored. Volk can have 1001 excuse or reason why he had won that fight, but history shows that no one remember losers.
P.S. It might sound that I am protecting Islam or he is my favorite, but that is not. If there was someone else on his place or Volk has won and Islam started to tell why he would have won, I would still be in winner favor.
P.P.S. Of course there are obvious robberies in UFC, but not in that case.