Diego Costa said that he worked hard to silence his critics after scoring twice in Spain's 3-3 draw with Portugal in their World Cup Group B opener.
The Atletico Madrid striker pulled Spain level twice after Cristiano Ronaldo put Portugal ahead, and he told reporters afterwards that he felt good throughout the game.
Spain head coach Fernando Hierro gave Costa the nod in his starting line-up ahead of Iago Aspas, Lucas Vazquez and Rodrigo, and the 29-year-old was happy to have repaid the faith shown in him.
"I have to work to shut people up," said the former Chelsea star, who was criticised after his disappointing performance at the 2014 World Cup.
"The goals are important but the truth is that I felt good throughout the game.
"I think we deserved to win, we created a lot more and had more of the ball. We equalised twice but we couldn't get the win at the end."
The 29-year-old and his team-mates have four days to prepare for Spain's next match, against Morocco in Kaliningrad on Wednesday.
And the burly striker insisted the competition for his place in the team was good for Spain's chances of glory this summer.
"There have always to be debates because this means that there are battles and this is good for the team," he said
"We are a family."
Unfortunately for Costa, his double was overshadowed by Ronald's hat-trick, with the draw leaving Iran as the shock leaders in Group B after the first matchday.