The national team coach has admitted that the holds the striker in high regard, but says he will have to prove himself just like any other playerVicente del Bosque has insisted that Diego Costa is not guaranteed a spot in Spain's World Cup squad following his decision to snub Brazil in favour of the Euro 2012 winners.
The Atletico Madrid striker recently announced his decision to represent Spain at international level rather than his native country and although Del Bosque has admitted that the world champions feel a certain obligation toward the 25-year-old, he will have to prove himself just like any other player.
"Diego Costa does not have unlimited credit. It is true that we feel a bit of an obligation, but the final decision will be based on his performances over the course of the season," Del Bosque said at a press conference.
"It was a hard and risky decision for him as he changed his dream of playing for Brazil to defending Spain's honour instead.
"He brings healthy competition to the team in attack and we will select those who are the best.
"There are still enough matches to prepare for the World Cup and he will get his chance."
Costa has been in sublime form for Atletico so far this season, netting 15 goals in as many official appearances.