Morrison struck in victory at Tottenham yesterday.
"He has taken on board what needs to be done to be a top footballer and it's not just all about being blessed with great ability. It is how you apply yourself, how you dedicate yourself to your profession and how you develop that ability in games of football," Allardyce told talkSPORT.
"He's starting to show the outstanding talent that Sir Alex Ferguson told me he had. Not only in terms of creativity and making goals, but also scoring goals. The lad is a fantastic finisher."
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