Most of the upsets in boxing are made through lucky punches
Inoue is heavily favored to win, but that doesn't mean that Butler doesn't have a chance. There is always a chance and opportunity for underdogs like Butler to win. They just have to make things work and grab that little sliver of opportunity when it presents to them. Who knows, maybe Butler can knock out Inoue in one of those rounds and we will all be shocked in disbelief
Lucky punch is something that can't just be done easily. It needs a strategy too and a powerful punch.
A perfectly timed punch, in the weakest (legal part to hit) part of the opponent, will render the opponent unable to continue. It isn't planned but rather the situation presents itself during the fight.
Remember how Juan Manual Marquez knocks out Manny Pacquiao? It was a lucky punch but that was also because his strength is enough to make Pacquiao down. If that lucky punch is not strong, Pacquiao won't end up kissing the floor.
Yeah, I can still recall the feeling of that moment lol. Manny was knocked out cold a second before the round ends. But there are rumors that Marquez had done some illegal drugs in preparation for the fight but it doesn't propagate maybe because there is not enough evidence.
To early to downplay how Butler perform on that fight and we should remember that he's a champion and already prove that he's a big opponent to every fighter he meet.
Well, he got the belt without any challenge. Though Sultan is a good boxer I believe he is not in league with Casimero or Donaire so it doesn't prove Butler is a top-class boxer. If he got the belt from Casimero maybe he will earn the respect of many of us.
Even though Inoue is really strong and at his prime but still we can't deny the fact that he's still a human and he might drop on Butler if he plays cool and underestimate Butler on that fight.
The thing is, Inoue can withstand the punches of Donaire, which I believe punched way harder than Butler. So with that, I believe Butler's power punch isn't a problem for Inoue. But of course, it is just what I think and may be proven wrong.