^Uhm did you mean he'll end it up with one punch and not on one chap? Coz they already been staring at each other for two straight chaps now.
The way I see it, Ippo is too tight and just concentrating everything in one punch. He'll throw a telegraphed punch and get countered but won't even flinch and his punch will walk right through his opponent as if nothing happened. He'll end this fight with one punch.