Spain midfielder Isco believes his side must stay true to the philosophy that brought them World Cup glory in 2010 to achieve the result they need in today's Group B decider against Morocco.

After a breathless 3-3 draw with Portugal in their opening game, La Roja laboured to a 1-0 victory over Iran, and require at least a point here against a Morocco side playing for pride to guarantee a last 16 berth.