Manchester United struggled in midfield during their 3-0 defeat to Liverpool on Sunday afternoon. Casemiro was a disaster for the Red Devils at Old Trafford with Erik ten Hag deciding to hook the Brazilian at half-time for Toby Collyer. United’s midfield lacked structure and Casemiro’s poor performance meant Kobbie Mainoo was left isolated far too regularly. Ten Hag’s side was crying out for an energetic midfield to help contain Liverpool, but £42m summer signing Manuel Ugarte could only watch from the stands after his deal wasn’t registered in time on deadline day. United now have the interna…