i think minato has got this, but i think minato and itachi are on equal skill levels. they've got the same amount of skill, but minato's abilities are good specifically for countering itachi's. he's fast enough to dodge amaterasu, skilled enough in taijutsu to do decently while not looking into itachi's eyes to avoid tsukuyomi. the last thing stoppign him, susanoo, can be bypassed if he marks itachi with the ftg seal.
thats the key to the match really, because skilled as minato is, he has to get the seal on itachi before he uses susanoo, or else he's done. it would be somewhat difficult however, as marking a sharingan user as skilled as itachi before he can react would be extremely difficult.