Paul Scholes is a doubt for Manchester United's Champions League second-leg tie against Real Madrid after being ruled out for a further fortnight with a knee injury.
Scholes, 38, is set to miss Monday's FA Cup meeting with Reading plus the Premier League game against QPR, while he could sit out the home match against Norwich.
Scholes has not played in the Premier League in 2013 and has not started since a game since the 2-2 draw against West Ham in the FA Cup on January 5. That means he is likely to have gone two months without a start when Real visit Old Trafford on March 5.
"It is a knee injury, which has been bothering him a bit," Ferguson said in Friday's press conference. "We have tried another treatment during the week. He will probably be back in another couple of weeks."
The former England international did not make the trip to Madrid for the 1-1 draw, but Ferguson reported a clean bill of health from those who did go.
"We've come through Wednesday night's game without any injuries," he said. "That's the best thing, apart from the result, of course."
Ferguson was also delighted with David de Gea's performance in the game, with the 22-year-old goalkeeper producing a string of saves to keep the hosts at bay.
"He is maturing," Ferguson said. "Very few goalkeepers go into the first team at 20. Gianluigi Buffon and Petr Cech are two examples of those who did but it is not always the case.
"Peter Schmeichel didn't join us until he was 27, and he gave us eight great years."