The Championship side welcome Chelsea to Elland Road on Wednesday night, eight days on from Bradford's famous penalty shoot-out triumph over Arsenal that booked their place in the semi-finals.
The win was the Bantams' ninth successive spot-kick triumph and Warnock is full of admiration for their exploit.
Yet he is unsure how much bearing his squad's extra practice will have on the outcome even if they manage to take Rafael Benitez's men to penalties.
"We will be practising penalties," he said. "(Bradford) should be teaching England. Are they English, the players taking them?
"You can't replicate it in training. I can score every time in training but I couldn't do it in front of a crowd.
"I never forgot taking one in front of a crowd. I would never ever shout at someone for missing a penalty because I wouldn't have the (bottle) to do it."
Regardless of how long it takes to reach an outcome, Warnock is relishing the kind of eagerly-anticipated clash that used to be a staple for Leeds a decade ago.
"Win or lose, it will be a great night," he said. "The whole eyes of the country will be on it because there is nothing else on.
"We are taking on one of the top three clubs in country and we want to show what a good team we are.
"I don't think there will be any moments where you fall asleep watching this game."