Context: a boxer is fighting against a defensive opponent that aims to win on points rather than KOs. The trainer of the boxer says:
守りも決定打を放つためのもの… ぶっ倒す欲のねェボクサーなど存在しねェし相手のデコ助も例外じゃねェ。 デコ助から狙うべきカウンター…ガキはもう見抜いてる。
I thought that デコ could be an abbreviation for
decoy, but I am not sure. 助 is
help, but I have no idea how to interpret it together with デコ. Also, I'de be grateful if you could explain if that から means
after. My attempt:
Even defense could be used to blow a decisive punch... A boxer that doesn't want to knock down doesn't exist, and the opponent's __ is not an exception. The boy has already understood that he has to blow a counterpunch from/after the __.
Here you can see the whole page. Thank you for your help!