This is not football - Carvajal criticises Iran tactics
Dani Carvajal described Iran's tactics as "disloyal" even though Spain recorded their first World Cup win.
Diego Costa's fortunate goal settled a tight contest in Kazan, moving Spain level on points with Portugal at the top of Group B.
Iran had a goal disallowed following a VAR review, while Mehdi Taremi was among those to miss chances for Carlos Queiroz's side.
Real Madrid right-back Carvajal, though, felt Iran's defensive tactics were over-the-top, while hitting out at what he perceived to be play-acting.
"The team sits back and that is a tactical strategy that is part of the game," Carvajal said.
"But the injuries are simulated.
"This is not football, it is disloyal, but everyone there with their conscience."
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Carjaval is now hoping future opponents at Russia 2018, starting with Morocco in their Group B closer, are more ambitious in their play.
"It has been hard for us to open the door," Carvajal added. "But we kept the clean sheet despite the chances they have had - they are three very important points.
"We are a team that plays direct, open and I hope we do not have rivals that put many players in their area."