Liverpool take on Manchester United this weekend in what is an unmistakably big moment for both clubs. The Reds have had an excellent start to the season, winning two Premier League games out of two, scoring four and conceding zero. United, meanwhile, have been a little more untidy. They managed a late, 1-0 win over Fulham on the Premier League’s opening night, but fell to a 2-1 defeat away at Brighton last week. The two managers know each other very well, of course, with Arne Slot meeting Erik ten Hag while they were bosses at Feyenoord and Ajax respectively. Slot got an early blow in on Ten …