The 24 year-old Brazilian footballer is a very aggressive player, a troublemaker, but he is one of the greatest modern strikers in the game right now who is given the freedom by Diego Simeone to float around near the opponent's box.
Costa scored 10 goals last season and did seven assists in the Liga, he was also the Copa del Rey top scorer with eight goals which clearly helped his team win the title. He is in top form this season having scored 8 goals from seven games putting him joint top scorer with Lionel Messi.
All the above stats seems not interesting for Brazil coach Luiz Felipe Scolari who only called him twice for friendlies in May 2013 against Italy and Russia, but was left out of the squad for the summer's Confed Cup. He had been granted the Spanish nationality in July 2013 and since he didn't played a competitive game for Brazil, he is free to make the switch.
"If Del Bosque calls me up, how could I say no? I'm going to choose the national team with which I feel most comfortable", the Atletico Madrid striker told Brazilian site Lance. So if Diego decided to play for Spain it is due to the lack of confidence and faith that his native country has showed in him.
Brazil or Spain, whoever Costa decied to go with will be so lucky having such a prolific striker in their squad ahead of the Word Cup.