European Champions Spain thrashed South Korea 6-1 in Salzburg, Austria in their penultimate friendly before Euro 2016.
Celta Vigo forward Nolito staked a claim for a starting berth in the opening group game in France against the Czech Republic by netting twice after David Silva and Cesc Fabregas had given Spain a two-goal lead around the half hour.
Juventus forward Alvaro Morata also scored twice, either side of Nolito's second-half strike, to round off Spain's biggest win since they thrashed Tahiti 10-0 in 2013.
Substitute Ju Se-jong got a consolation goal for South Korea.
Everton striker Romelu Lukaku scored two minutes from time to give Belgium a 1-1 draw in a friendly against Finland.
"We should have won today, so it is up to us to learn from this," said Lukaku, who was supposed to rest on Wednesday and was only brought on to avoid an embarrassing defeat.
Finland, ranked 61st in the world, were kept in the game by Hradecky who capped his great game with a superb save from a shot by Mertens in the final moments of the match at the King Baudouin Stadium.
Belgium also face Sweden and Ireland in the group stage and will play Norway next Sunday before leaving for Euro 2016 in France which runs from June 10 until July 10.