Unai Emery has supplied a telling update on some of his injured Aston Villa stars ahead of their trip to Sheffield United. It’s been a difficult few weeks for Aston Villa on the pitch. Unai Emery’s side are winless in three matches in all competitions and saw their 17-match unbeaten home run come to an end at the hands of Newcastle United on Tuesday night. As the old saying goes, Villa need to dust themselves down and bounce back from their recent hardships by putting in a statement performance against Sheffield United. With only one win against the Blades in their last seven matches, the Prem…