Manchester United goalkeeper David De Gea has urged Wayne Rooney to join him in committing his future to the club.The Spanish goalkeeper admits it will be strange heading into pre-season without Ferguson at the helm but insists the squad will all be behind his replacement Moyes. "I felt great sadness when I heard about Ferguson's goodbye," he added. "It will be strange not to see him on the bench or on the training ground. He is everything at Manchester United. He is Manchester United. "He [Moyes] had done a great job at Everton and now all of us have to support him. "To substitute Ferguson is a huge target but if they chose him to do it, it is because he is prepared."