straight to your inbox every day for freeJurgen Klopp admits his Liverpool side are struggling for form ahead of facing Manchester United on Sunday.United face their fierce rivals on Sunday sitting three points ahead of them in the Premier League table after Tuesday night's win over Burnley.Liverpool have not been at their best recently with disappointing draws against West Brom and Newcastle and a defeat to Southampton.Klopp is well-aware of his side's lack of form going into the game but he