The phrase "knockout game" refers to a dangerous activity in which individuals try to knock out unsuspecting people with a single punch. Full definition
Your reading to much into knockout games and if they beat them so on etc etc.. (justarsenal.com)
I don't usually get scared when Juventus play knockout games in Europe. (sbnation.com)
The match between Aduana Stars and Techiman Eleven Wonders will not come off as the former are currently in Madagascar to play the second leg of their CAF Confederations Cup knockout game against Forsa Juniors. (ghanasoccernet.com)