Kevin Lee and Danny Castillo should show you that Tony has never been able to get up from bottom position against a strong top control guy. As the competition increased, better fighters with better top control exploited his weakness and he was dominated by Charles and Dariush. The only chance he would have is a sub off his back or hope Khabib got too tired from holding him down. On the other hand, we don't know what damage Khabib would inflict on Tony from top control as Khabib's ground and pound is significantly better than that of Charles/Dariush. But it should be clear that Khabib had a much easier path to victory. Elbows from the bottom didn't do anything for Tony against Dariush who wasn't even doing a good job of avoiding them. As Khabib said, Tony is too skinny to compete in the grappling.