At 160 GGG wins by death but I would give Khan a chance at 147 with GGG being to weak to enter the ring and Khan wins by walk over.
He could have won. He took nearly every round and was well ahead on the cards. It was always going to be difficult for him to avoid the big punch. But he certainly could have won.
Khan boxes GGG's kosovorotka off and wins a wide decision. Then Brook/Khan for true 160 lbs supremacy.
People always talk about GGG ducking Charlo, Derevyanchenko, Canelo, BJS, Murata, etc. But I think the guy he's avoiding the most is Khan. Khan's hand speed puts Oldlovkin to sleep, grandpa won't see any of those punches coming. He should stick to fighting bums instead.