Roglic is racing close to 100% since the beginning of August. This is his second Grand Tour. He invested a lot the last days to get the red jersey back. Just give him a break. If he has anything left in the tank, he can fly tomorrow.
This is the 2nd GT of all the top 5 tbf. Mas rode just as hard in the Tour as Roglic. Carapaz came as a superdom and had to try rescue Ineos' tour. It's not Roglic is up against guys who are very fresh here