There was no last ditch, scrambling defending. They had a game plan and they shut Liverpool down, a Liverpool team that had been scoring for fun, and who may still break the record for goals scored in a PL season (forget who holds that record).
Plus it was a scratch team that had no time together, so they're hardly going to play like Barca.
Lesser teams can defend for their lives, but not shut a game down AND score twice.
Liverpool used to suffocate teams with offside trap and endless backpasses, very few clubs haven't done it when needs must