This is not a 1v1 battle.
Both men have equally sized armies. Battle on the Trident. Both in their physical prime. This is a battle of commanders, both in their primes all things being equal which military force would defeat the other? 2 weeks prep.
Book and Show feats valid.
Round 1: Neither have their usual right hand man [Davos & Ned]
Round 2: They do have their usual right hand men to help them.