Castro backs Sevilla to shock Real Madrid and Barcelona
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![Castro backs Sevilla to shock Real Madrid and Barcelona](http://static.goal.com/3552800/3552852_gallery.jpg)
![Sevilla celebrate winning the Europa League Sevilla celebrate winning the Europa League](http://static.goal.com/3552800/3552852_thumb.jpg)
The boss of the Sanchez-Pizjuan outfit believes that they can kick the season off in style by producing a couple of major shocks against the giants