Certain players in FIFA 11 has traits/ specialties attached. These include "playmaker", "crosser", "aerial threat", "distance shooter" and "poacher". If you perform certain tasks with a player with these abilities, you'll get an achievement.
One of the ways to get the "Playmaker" achievement is to play as Roma and put Francesco Totti in the starting line-up. Keep threading passes with him until someone scores from his passes to unlock this achievement.
You can do so on any difficulty level. I won this achievement on Amatuer.