The Northern Irishman came off after just 19 minutes.
Forest have lost again today, suffering a 2-1 loss to relegation threatened Bristol City at the City Ground.
The defeat was their third in a row and Forest fans booed the players off the pitch after the game.
Their cause was not helped by an early injury for Jamie Ward. The Northern Ireland international came off in the 19th minute for Tyler Walker and it meant Forest having to change their gameplan early on.
Speaking after the game Dougie Freedman commented on the injury to his attacking player and believes it is not too serious. He told BBC Nottingham Sport that it should be a matter of weeks until he returns to action:
"He can recover quite quickly from injuries so with a bit of luck, maybe two or three weeks"
Forest have had to battle with plenty of injury problems already this season and this was a blow that Freedman could have done without.
Their brief hopes of sneaking into the play-offs are now dead and buried and Freedman will now have to make do without a regular starter.
How quickly things can change.