"Hopefully I might add something the team haven't got at the moment," he said.
"Nobody is going to replace Ronaldo, even though I wear his shirt, but if someone like Wayne (Rooney) could improve his game five per cent, that would help. I can add a little bit, there is Antonio Valencia.
"Everyone is going to have to step up to the plate a bit more to make up for him."
"There are so many players on my wavelength - world-class players," he said.
"I would hope there is no-one similar to me in the way that I play. I can see Wayne Rooney or Paul Scholes as soon as they get the ball looking for one of my runs."
Ferguson refused to get carried away with praise for the debutant.
"I know he will give us a good contribution of goals. That will be a more important time to appraise him."