Rooney took his tally in all competitions this season to a personal best of 25, with his brace in the 3-2 win over AC Milan in the San Siro.
“He could break 30,” said Ferguson.
“This season in particular, over the last two months, there has been a marked improvement in his game.
“Confidence has a lot to do with it of course.
“I just felt he had to improve his goalscoring, which is what he is doing now.
“His overall performance was absolutely devastating. Milan couldn’t handle him. They just couldn’t handle him.
“He has to be regarded at the highest level, along with all the other players we know about.”
