Diego Costa opens international account.

Diego Costa opened his goalscoring account for Spain as they ran out comfortable 4-0 winners over Luxembourg on Sunday night.

The striker, who had not scored for his adopted homeland since defecting from Brazil in February, netted Spain's third goal in a routine victory.

Having lost 2-1 to Slovakia on Thursday, coach Vicente Del Bosque named the youngest side of his six-year tenure, including goalkeeper David de Gea in place of out-of-form captain Iker Casillas.

But it was one of the older heads that opened the scoring as David Silva put them ahead after 27 minutes at the Stade Josy Barthel.

Paco Alcacer then doubled the lead shortly before half-time with his third goal in as many competitive Spain games, before Costa ended his international drought with a scrappy effort.

Juan Bernat capped his debut with a late strike to add gloss to the scoreline for the much-changed European Championship holders.

The win puts Spain in second in Group C behind leaders Slovakia, who have won three from three so far.