Real Madrid forward Alvaro Morata has branded his rivalry with Spain teammate Diego Costa "a luxury" after both players scored twice in La Roja's 8-0 win over Liechtenstein on Monday night.

Morata was Spain's number one striker at Euro 2016, but Costa has since returned to the international set-up and the Chelsea forward was given the nod to start the 2018 World Cup qualifier against the Group G minnows.

Morata, who replaced two-goal Costa late on before netting twice himself, has insisted that the two players have a strong relationship despite their battle for one position in the team.

"My rivalry with Costa is a luxury," Morata told Goal.com. "[Critics] said the strikers didn't score and now we have scored four between us both. Costa has dedicated his goals to me, so imagine the relationship I have with him. I have no anxiety to score."

Spain will return to international action with a trip to Italy next month.