There was some luck involved with THAT punch because Manny was practically "by it"!
Manny doube feinted (huge no no in boxing) then fell in and his right shoulder was almost touching Juans! Juan was late lettng it go but the results showed it was on the money!!!
The move is practiced by every countermover/counterpuncher against an agressive southpaw so its not a lucky circustance!!! However Manny aided Juan by making three mistakes in sequence and paid the price!!!

The punch had a little luck to it!!! Nothing wrong with some luck! Ray.