i have played alongside or against every player in the Croatian squad and they certainly have enough ability. Most of the time what can appear to be a lack quality with fringe players is just a lack of confidence. Psychologically, the most important thing for most players mentally is to feel the trust of your coach and the freedom to make mistakes, which paradoxically results in fewer errors. If a coach doesn't show belief in some players they will perform below their maximum level. With a coach's confidence a player can be a world-beater and without it the same player can look out of his depth. The coaches give a couple of minutes to a player and, when he doesn't perform, wrongly attribute this to a lack of quality; Reinforcing their belief that they must stick with their favourite players.