The trio of Mauro Formica, David Dunn and Danny Murphy are all battling injury problems as Rovers look to kickstart their season under their Norwegian manager.
A hamstring injury meant Murphy sat out the 4-1 defeat to Cardiff last Friday, while Dunn and Formica have knocks which Berg concedes he will have to monitor.
"Gato (Formica) has played all our games and he has not been used to playing so many games," said Berg.
"Those games have taken their toll on him and he's got a knock, so we'll see on Friday or Saturday how he is.
"Danny and David are getting closer but we'll have to wait and see if they are available or not."
Blackburn are still without strike duo Nuno Gomes (hamstring) and Leon Best (knee).
Rovers are targeting a return to form having taken just one point from their last four outings, with Berg securing only one win in his first eight games in charge.