Barthez is missing from United's first European jaunt of the season as Ferguson's side travel to Hungary to play Zalaegerszegi in a Champions League qualifier.
The French shot-stopper is sidelined with the hip problem, which hands a chance of an extended run in the first team to his Northern Irish understudy Roy Carroll.
The former Wigan Athletic man has already shown that he is a more than capable of providing cover, but the exit of Dutchman Raimond van der Gouw in the summer means that next in line is 19-year-old Ben Williams - who will be on the bench on Tuesday evening.
Ferguson admitted that his goalkeeping situation was something he was looking at.
"If Barthez were not to recover, I would have to think about it," confirmed the Scot.
The transfer deadline that Ferguson is working to is August 31 and if Barthez is not fit by this point, then a new goalkeeper could very well be added to the Old Trafford ranks.
