It’s safe to say that Liverpool were absolutely phenomenal away at Manchester United on Sunday afternoon, Arne Slot’s new era at the club well and truly begun. There’s already been glimpses of how Liverpool can improve under Slot in the opening games of the season, but the likes of Luis Diaz and Mohamed Salah took things to another level at Old Trafford. United were poor, there’s no escaping that, but Slot’s side were excellent, they’ve already found the arrogant brilliance of some of Jurgen Klopp’s best teams in the past. No doubt, there will still be blips along the way, but Liverpool proved…