Having already endured a tough start to his Manchester United career, manager David Moyes could find himself suffering from even more headaches come the summer. With United falling nine points off the top four following the disappointing 2-2 draw at Old Trafford against relegation battlers Fulham, the under-fire Scot could face the prospect of losing a number of big names should United continue to struggle. With club captain Nemanja Vidic already heading for the exit door when his contract expires at the end of the season, Moyes could well find himself losing more than the big Serb come the summer. Should United fail to finish in the top four, then the lack of Champions League football at Old Trafford next season could well be a key factor in determining who United attract, as well as who they could well lose. The signing of Juan Mata would have given United fans some encouragement, but the £37.1 million man has failed to make the sort of big impact that they, and Moyes, would have been hoping to see. His signing has been the small ray of light in United's ever darkening season. And the dark cloud hovering over Moyes and United could fail to lift into the summer and next season, should any of the five names mentioned below move on at the end of the season. Click "next" below for us to get started...