Spain's striker David Villa C scores the opening goal in front of Portugal's goalkeeper Eduardo L during the 2010 World Cup round of 16 football match Spain vs. Portugal on June 29, 2010 at Green Point stadium in Cape Town. NO PUSH TO MOBILE MOBILE USE SOLELY WITHIN EDITORIAL ARTICLE - AFP PHOTO CARL DE SOUZA

Spain's striker David Villa C scores the opening goal in front of Portugal's goalkeeper Eduardo L during the 2010 World Cup round of 16 football match Spain vs. Portugal on June 29, 2010 at Green Point stadium in Cape Town. NO PUSH TO MOBILE MOBILE USE SOLELY WITHIN EDITORIAL ARTICLE - AFP PHOTO CARL DE SOUZA

Good fortune has benefited Spain four times so far in the World Cup and it remains to be seen whether lady luck will smile on the European champions on a fifth occasion.

In the match against Honduras (2-0), Spain had the advantage of an own goal by their opponents.

In the Chile game (2-1), David Villa scored thanks to the Chilean keeper being way off his station.

In the Portugal match (1-0), some observers considered Villa’s goal to be offside.

And Paraguay had a goal disallowed in their match against the Spanish ((1-0) on grounds which observers thought were dubious.