- Iran are winless against European opposition at the World Cup, having lost five of their six previous fixtures (D1). During the break, we knew we had a plan and I think we carried it out - my players did what they had to do.
Costa scored in the 54th minute after being set up by Andres Iniesta. It appeared that Beiranvand exaggerated his pain after Costa stood on his foot.
Spurred on by their vociferous fans, Iran's imposing players did well to handle Spain's attacks.
Iran had relied nearly entirely on their steely defence to keep them in the match for the first 54 minutes and it was only after the ball had deflected off Costa's knee and into the net that they took the game to the Spanish.
Costa's initial strike was blocked but the ball bounced back off him to give La Roja a hard fought win.
And for much of this game, the Iranians looked like they could fend off their favored adversaries even as Spain dominated possession and camped out in their attacking third of the field.More news: Cristiano Ronaldo goal earns Portugal 1-0 victory over Morocco
Iran will take confidence from this defeat but Spain will be frustrated that their dominant possession can not be turned into goals, but for the moment there will be relief in the Spanish camp that they held on for three points. Replays showed that the ball had come off Costa's knee in the last touch, but he wasn't complaining as he wheeled off in celebration.
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- Diego Costa has scored eight goals in his last eight worldwide starts for Spain - he scored with both of his shots on target in their 3-3 draw with Portugal. Spain were clearly lacking something come halftime, and given the wealth of depth that Spain possess, one would have liked to seen the former Madrid defender go to the bench earlier than he did.
He only had one chance against Iran, and he converted it.
Unfortunately for the 15,000-plus raucous Iranians in the crowd their joy was short-lived as the VAR confirmed the assistant referee's on-field decision that Saeid Ezatolahi had been marginally offside in the build-up.
The result put Spain joint top of Group B with Iberian rivals Portugal on four points ahead of their last match against the already eliminated Morocco.