Not only is the World Cup a chance for football fans to cheer on their countries for the first time in four years, it is also a golden opportunity for players to put themselves in the shop window.

Whether you're an unknown fledgling starring for an underdog country or an old boy hoping for one last shot at glory, nothing can change to value of a player more than a few good performances at the World Cup.

This summer's competition promises to be no different with a number of stars, young and old, hoping to elevate themselves into the limelight.

We're going to concentrate on the established stars, who have been left with something to prove ahead of this summer's tournament. 

A good World Cup could prove all the doubters wrong while a bad World Cup could see them fall into the abyss, never to emerge.

Thomas Vermaelen
Fernando Torres
Andros Townsend
Javier Hernandez
Jack Wilshere
Shinji Kagawa
World Cup
Iker Casillas
Alex Song