Luckless loanee Florent Cuvelier has been ruled out for the rest of the season after just 30 minutes of action for the Valiants.
Cuvelier was stretchered off on Saturday with a knee injury and following a scan the club have confirmed that the injury is serious.
The Belgian midfielder has damaged cruciate ligaments in his right knee and will be out of action for five months.
The injury news is a huge blow for the Valiants.
The Cuvelier signing was seen as something of a coup and a real boost to the club’s hopes of a play-off place.
Florent Cuvelier Factfile
Clubs: Portsmouth, Stoke City, Walsall (loan), Peterborough (loan), Sheff Utd