Diego Costa may be firing on all cylinders for Chelsea and has proved his class in the Premier League, but he has yet to convince the Spain fans.
The 26-year-old is widely acknowledged as one of the best strikers in the world, but for the national team he has consistently failed.
Born in Brazil, Costa played for the South American giants in two friendly internationals in March 2013, but later that year he switched allegiance to Spain.
Costa was expected to be a star for the 2008 and 2012 European champions at the 2014 World Cup in Brazil in the summer, but he spectacularly failed.
There are suggestions that the former Atletico Madrid star is not suited to ‘tiki-taka’ style of Spain, with questions being asked of the Spanish football federation why they wanted him so much.
Spain coach Vicente del Bosque has also been criticised over this decision, but he insists that Costa will come good in due time.
‘I have a feeling that he will be very important for us’, Marca quotes him as saying. ‘I believe in that possibility.
'I have great faith (in him). Diego faces a challenge to prove to everything that we made the right decision. I have lots of confidence in him, and we will have a good tour with him’.
Costa has been backed to succeed for Spain by his national teammates, but doubts still remain. However, the Chelsea striker will be determined to prove his doubters wrong by scoring against Slovakia and Luxembourg away from home in upcoming Euro 2016 qualifiers.