Spain striker Diego Costa is determined to repay the trust of Spain coach Vicente del Bosque on him.
The 26-year-old said he feels physically better and can give much more, Sport24 reported.
The Chelsea forward further added that it is crucial for him to perform well now.
Costa, who made his Spain debut against Italy in March 2014, did not score any goal until his most recent appearance, where his side won the match against Luxembourg four nil to qualify for the Euro 2016.