Diego Costa trains with Spain for the first timeDiego Costa's decision to turn his back on Brazil has upset a lot of people
The Brazil-born forward has trained with Spain as they prepare for Wednesday's friendly against Italy.
Diego Costa is expected to make his debut for his adopted country when the two teams meet at Atlético Madrid’s Vicente Calderon stadium.
The in-form 25-year-old has scored 21 goals for Atlético in La Liga this season and is well placed to earn a place at the World Cup finals in Brazil ahead of the likes of Fernando Torres and David Villa.
"I think he is a great choice and he can bring a lot to the team," Spain and Real Madrid centre back Sergio Ramos told reporters on Monday as he arrived at the team's training camp.
Ramos refuted the suggestion that there exists bad blood between the two following clashes in recent Madrid derbies.
"There is no problem, that is just part of our sport. Football is for smart people, we are team-mates in the national team now and a different way of behaving is required."
Brazil coach Luiz Felipe Scolari was angered by Costa’s commitment to his adopted country and has accused him of "turning his back on the dream of millions".
He is not tied to one country until he has played in an official competitive game and has only represented Brazil in friendlies against Russia and Italy last March before being left out of the squad for June's Confederations Cup.