After playing loads of seasons/ spending hours! as a created player and being top goalscorer etc, world player I still couldn't get this. Not even in the top 3.
I saw a method on the PS3 forum but there's an even quicker way than that.
Dont need to edit ratings.
Firstly, go into edit and move Xavi and Ronaldo to a rubbish team. I have an option file with Birmingham on, I moved them there.
Then start a game as Messi.
Then just sim until season 2 and you'll get it. Having played no games!