Forest have Joel Lynch and Nathan Tyson available after ankle injuries.Defender Lynch was hurt in the recent draw against Middlesbrough, while striker Tyson has missed five games. [LNB]Doncaster will be without leading scorer Billy Sharp, who will undergo surgery to resolve a hernia problem and could miss the rest of the season. [LNB]Midfielders John Oster (calf) and Paul Keegan (knee) and on-loan Southampton defender Joe Mills (foot) could all return to the squad. [LNB][LNB] MATCH PREVIEW Nottingham Forest must be hoping it will not be a case of waiting ages for a home defeat, only for two to then come along. Beaten at home for the first time in a regular-season match since September 2009 against Hull in their last game at the City Ground, the Reds need to get back to winning ways after a worrying recent wobble. [LNB]Doncaster have won on two of their last four visits to Forest, and recently beat Derby 3-1 on their last visit to the East Midlands. But that was Rovers' only win in nine away matches, and they have conceded more Championship goals this season than any other team. [LNB]Forest have problems of their own. In the space of three weeks they have fallen from the automatic promotion spots to sixth - four points outside of the top two - and are without a win in five matches. They were beaten by next-to-bottom Sheffield United last time out, having recently lost to struggling Scunthorpe and drawn with bottom club Preston. [LNB]A defeat on Saturday would see Forest slump to three defeats in a row for the first time in two years. It would also be a massive boost for Doncaster, who are only nine points above the relegation zone and continue to be plagued by injuries to key players. [LNB][LNB] MATCH FACTS Head-to-head[LNB]• These clubs have met 30 times before in the league. Forest have won 14 of those matches and Doncaster seven. [LNB]• But Forest have won only one of their last nine matches against Rovers. [LNB]Nottingham Forest[LNB]• Forest have won only one of their last eight league games. [LNB]• They have picked up an unrivalled 20 Championship points from games in which they have conceded the opening goal. [LNB]• The next goal the Reds let in will be the 100th conceded by them in the league under boss Billy Davies. [LNB]Doncaster[LNB]• Doncaster have won only two of their last 14 league matches. [LNB]• Rovers, who have conceded 66 league goals this term, have not kept a clean sheet in nine matches - and in 17 away from home. [LNB]• They are yet to win away this season against any of the sides currently in the top half of the table.