The Chelsea striker has struggled at international
level but has been backed by his coach, who also tipped David de Gea to
emulate Iker Casillas
Costa has scored just once in nine appearances since opting to play for La Roja over the country of his birth, Brazil, in 2014.
He has recently been criticised by Spain fans for failing to fit into the team's passingstyle, with the likes of Alvaro Morata and Paco Alcacer impressing in the lone striker role.
However, Spain head coach Del Bosque stands by his decision to bring Costa into the squad before last summer’s World Cup.
