Yes of course. However well practiced, planned and executed even a counter punch is, when being delivered after a feint, there will often be an element of chance present. That is what all those hours, weeks, months and years of practice are spent anticipating.

The mistake is to assume the guy throwing the fight ending perfect punch is relying on that one lucky opportunity to capitalise on his opponents errors. The chance element is there but in the opponents mistakes.

The good thing happening by chance here is a lucky punch, but not because of any random factor introduced by the guy throwing it.

When Cormac Mccarthy said

"You never know what worse luck your bad luck has saved you from"

He was pointing out how bad luck is often a warning that if heeded can avert a greater disaster.

If Pacquiao had taken heed and made adjustments could he have avoided the Marquez planking? Maybe, what about after? For him it was certainly bad luck but it didn't end his career.

If a fighter is capitalising on his opponents mistakes does that mean there is no bad luck involved? Skillful and meaningful execution of a punch does not preclude or remove the element of luck, good fortune or chance from the equation.

You have to buy a ticket to win the lottery and in a 36 minute contest you are simply reducing the odds of being hit and increasing the chance you will hit your opponent by training. There is always a random 'luck' factor in play.