Who are the unsung heroes at our professional football club who create the ideal environment for players to excel? Time to find out. In All Access: Pro League our journalist becomes an employee at a professional football club for one day. We start at KRC Genk as a goalkeeper coach where we follow a true legend of the game: Guy Martens. Guy has trained some of Europe’s best goalkeepers: Thibaut Courtois, Koen Casteels, Sinan Bolat, Maarten Vandervoordt, Mike Penders, you name it.