Pakistan, July 2 -- Spain march into their World Cup last-32 clash against Austria on the back of an unbeaten run of 34 matches, a defense yet to be breached and an old question still nagging away - what happens when all that possession runs into a locked door?

Luis de la Fuente's European champions face Ralf Rangnick's Austria, who are making their first World Cup knockout appearance in 44 years after finishing runners-up in Group J, with Spain carrying momentum and a mild tactical headache.

The Spaniards topped Group H with two wins and a draw, taking seven points from nine, after Friday's bruising 1-0 win over Uruguay. It was progress, certainly, but not perfection.

Spain have looked secure at the back, with goalkeeper Unai Simon ha...