Edited sentence: He is widely regarded as one of the best 3 goalkeepers in the world alongside Buffon and Cech.The defense in front of him has always been shaky and constantly changing therefore giving Casillas a much harder time than his fellow other 2 top goalkeepers.Throughout Real Madrid's silverware drought during 2003-2006, he was undoubtedly the best player on the field, constantly producing world class saves to keep Madrid in the game