"It has been difficult but I am injury-free now," he said. "A cartilage problem is always difficult. It seemed a bit dangerous and I was a bit worried at one point because it is never good to play with a swollen knee.
"But I am clear of it now. The manager is doing the right thing and I am trying to forget about it."
At least Saha has been able to step into the breach during Wayne Rooney's recent absence, although now the youngster has recovered from his own ankle injury, the 28-year-old might find himself on the bench, with Ferguson using his pace and power for added impact late in the contest if things are not going well for his team.
Saha is cautious about placing too much expectation on himself so early into his comeback.
Yet he knows a goal - he has not scored since netting the winner against Sunderland in September - would work wonders for his confidence.
"Goals are the main part of the game for any striker and it would really help me if I could get one," he said.
"I am hungry for goals and the good thing about being in this team is that you know we will always create chances."