The 21-year-old winger converted from the penalty spot in the 19th minute to give Spain the lead in their eventual 3-2 win over Croatia in Euro2017 qualifying in Rijeka.
Marco Asensio's first-time finish in the 41st minute gave Spain a two-goal advantage before Deulofeu pounced on a glaring error from Croatia keeper Dominik Livakovic to slot home simply in the 54th minute.
Croatia hit back with goals from Chelsea youngster Mario Pasalic (on loan at Monaco) and a penalty from Josip Radosevic but the damage had already been done as Albert Celades' men made it two wins this international week to go top of Group 6 ahead of Croatia by one point.
Check out the highlights below:
.@gerardeulofeu's two goals for @SeFutbol U21s can be seen here: https://t.co/IzXzeAIGVe
— Everton (@Everton) November 17, 2015