Vicente Del Bosque has made a bold halftime substitution, bringing on Koke for Xabi Alonso in a bid to chase down Spain's 2-0 deficit. Chile has outplayed Spain in midfield, particularly Xabi Alonso, and the Real Madrid man is who has been removed in favor of Atlético Madrid's starlet.
Alonso's always been an odd fit in Spain's midfield -- he's a completely unnecessary player in a midfield that includes Sergio Busquets and an advanced playmaker -- but they've won titles with him starting because they've simply had the most talented side. But talent alone doesn't carry them anymore, and this switch is a positive one. Especially given that Alonso picked up a yellow card in the first half, could have had another and gave the ball away a few times.
Koke is a different kind of player to Alonso and should provide a spark. While Alonso sits deep without actually doing any defending, Koke is much more energetic. He'll work harder defensively and has a knack for scoring goals from midfield.