"He is out of hospital now and will begin his rehab almost immediately, but it will take longer than normal because more of the cartilage has been removed.
"At the moment we are probably looking at Fozzie being out for around two months. Hopefully, he will be back for April."
Forster had to undergo a knee cartliage operation earlier in the season and the problem re-occurred when he had to be withdrawn at the KC Stadium in late December.