The 65-year-old says he has full confidence in his new-look squad ahead of this summer's tournament in France and says they must prepare well if they are to emerge victorious
Spain head coach Vicente del Bosque admits his squad is not perfect as the defending champions prepare to defend their title at Euro 2016.
Under Luis Aragones, Spain ended their 44-year wait for a major international trophy by seeing off Germany 1-0 in the Euro 2008 final.
Del Bosque subsequently took over and guided the team to World Cup glory in 2010 before a successful defence of their European Championship title with a 4-0 demolition of Italy two years later.