He is really training for this fight. Everybody gets tired. I am not saying Golota is not going to get tired. Golota has the advantage in strength over Tyson. Tyson has the speed advantage over Golota.
Speed brings the power.
If Golota had the speed that Tyson has, there would be no fight. Once Tyson realizes he is in a fight, all of the dirty tactics will come out. Golota is just going to throw those arms at him. Golota has a choice to fight from either the inside or outside. Tyson cannot fight on the outside.