When he [Amorim] changed and put Mason Mount in that position they still went with a back five but they were building with a back five against Grimsby who were sitting on the edge of their own box. Your spare man was in build up when you needed the spare man higher up the pitch to make an overload out wide or through the middle.

Report and free match highlights from Carabao Cup second round tie at Blundell Park; Man Utd goalkeeper Andre Onana makes two errors for Grimsbys first-half goals from Charles Vernam and Tyrell Warren;