Spanish playmaker Isco say Wednesday's match against Iran will determine their World Cup destiny as they seek to register their first win in Russia following a gripping 3-3 draw against Portugal. Champions in 2010 and among the favourites this year, Spain's World Cup ambitions were kept in check, almost single-handedly, by a stunning Cristiano Ronaldo hat-trick.

The draw came just two days after Spain's campaign was thrown into disarray by the shock sacking of coach Julen Lopetegui following an untimely announcement by Real Madrid that he would join the 13-times European champions after the tournament. Fernando Hierro, Spain's sporting director, is now at the helm but barely a week into the tournament La Roja -- expected to join Brazil, Germany and France in the latter stages -- have endured more drama than they would have wanted or expected.