I agree that Kovalev does not have the athleticism to force Hopkins to tire under pressure unless his training habits were abruptly changed like longer runs or training at high altitudes and most of all remaining calm and jabbing from the outside. Hopkins wears you down when he comes in and years ago Roy Jones beat him from outside, a feat he could no longer utilize in the rematch. I am not a B Hop fan but he never deviates from a plan and that's discipline. Kovalev depends on his power too much and sometimes plods his way in and cutting the ring off on B Hop means not rushing him but slipping in withe finesse. Mr. K is going to have a rough time if he rushes toward B hop in a straight line like a slugger with no finesse. B Hop is a clean liver but knows how to fight dirty on the inside and if Kovalev depends on his power he may be disappointed. Cutting off the ring, using his jab generously may surprise B Hop into a mistake from a point where B Hop can'[t manhandle him. I still wouldn't bet the house on the younger opponent.