The record books will say a win for Manchester United that was just as convincing as Liverpool’s by the same scoreline in the same fixture last season. What is harder to work out is how David de Gea ended up man of the match for most people when United were so demonstrably on top. De Gea is certainly on form at the moment, he was presented with a second successive player of the month award before kick-off at Old Trafford, bringing Liverpool’s present goalkeeping problems into sharp focus, but when a goalkeeper is regularly outstanding it usually says something about the protection he is getting from the rest of the team. United did make defensive mistakes against Liverpool – Jonny Evans’s sloppy backpass should have been punished for a start –but Evans was one of only two regular defenders in the home lineup. Once Luke Shaw, Chris Smalling and Marcos Rojo return United should be more solid at the back, or at least that is the theory. Louis van Gaal still seems to have more attacking-minded players than reliable defenders, though maybe that is the way he likes it.