By Ewan Murray Manchester United have the chance for redemption in the FA Cup this season, but they will need to navigate a tricky quarter-final against rivals Liverpool this Sunday. The Red Devils seemed to have turned a corner at the beginning of the new year, but their performances have been questionable once again in recent weeks. They have lost two of their last four games and their record at Old Trafford leaves a lot to be desired. However, the good news for United is that they are likely to welcome back a few key players from the treatment table for Liverpool’s visit, although they will…