Ferguson said: "His goal tonight was well-taken. It may not be the best goal he has scored this season but it may turn out to be one of the most important.
"He has scored 30 goals already this season, and it is only the start of March. Potentially there are 16 or 17 games ahead of him, so he could end up with an even higher score.
"For a wide player to do that is fantastic. It is a great contribution."