Manchester United's defensive duo Rio Ferdinand and Nemanja Vidic have been declared fit to face AC Milan in the second-leg of the UEFA Champions League semi-final on Wednesday. Ferdinand missed United's last two matches after sustaining a groin injury while Serbian defender Vidic has been out for a month due to a dislocated shoulder. Despite the injury crisis within United's squad, Scottish boss Alex Ferguson has not decided yet whether to field the duo at San Siro. "Vidic got the all clear from the specialist on Monday and Rio has done some training over the last two or thre days," Ferguson told the pre-match press conference. "With both of them we have a decision to make, frankly I'm nowhere near making it. I need to see them train. I'd be delighted to play them both, but I don't know if that's possible." United will be looking to maintain their narrow lead after grabbing a 3-2 victory at Old Trafford, thanks to a last-gasp strike by Wayne Rooney.