Warnock told reporters: "I don't think I'd be able to cope. I only had six months with the current type of Premier League players and I didn't enjoy that at all.
"I wouldn't like to have two teams where you've got 11 or 12 not in the team to deal with, who are world class players, who all think they should be in the team, who all their agents think they should be in the team. Good luck to them."
Leeds are looking to knock out Premier League opposition for the second time in a row after beating Tottenham Hotspur in the fourth round of the competition.