By Ewan Murray Liverpool are aiming to set up a second trip to Wembley this season when they face Manchester United in the FA Cup quarter-final on Sunday. The Reds have already lifted the Carabao Cup in the capital this season and will book a place in the FA Cup semi-final if they overcome Man Utd at Old Trafford. Jurgen Klopp’s side are in amazing form, which cannot be said of their opponents this weekend. However, Klopp still has a whole host of injuries to contend with ahead of the trip to Manchester, and the 56-year-old will have some selection headaches this Sunday in what is a gargantuan…