"Federico's goal was excellent," enthused Ferguson.
"His movement was very good and he always seems to do well when he gets on the shoulder of defenders.
"It is really pleasing to see your strikers scoring.
"Obviously the main ones are going to be Owen, Rooney and Berbatov and I am very comfortable with that.
"But if Federico continues to progress, it will be a big advantage to us because it would give us an extra player from the word go."