The goalkeeper has admitted that La Rojita are still in a state of shock after their defeats to Japan and Honduras, but they are determined to avoid the ignominy of another loss
La Rojita have no chance of qualifying for the knockout stages after successive shock defeats to Japan and Honduras and the Manchester United goalkeeper freely admits that they are still coming to terms with their premature elimination.
However, De Gea insists that they are well up for their final tournament outing.
"We are going through a hard time, but we have another game and we will be professional," the 21-year-old shot-stopper told the Spanish Football Federation's (RFEF) official website.
""We will go flat out and try to win the match. We still trust in ourselves. We know how we play and who we are.
"We will try to vindicate ourselves, and give the maximum to show people that we are a good team.
"We are frustrated because these are difficult times; it's not easy to deal with an elimination at the group stage, but that's football.
"But you have to get back up, and keep working and fighting. We are young and there are definitely many beautiful things to live for!"
De Gea, who joined United from Atletico Madrid last summer, admitted that he is particularly fired up given the game is being staged at Old Trafford.
"It will be a special day for me as we are playing on my home pitch, in front of my people, so it will be something special," he enthused.
"We played a great game against Honduras, but the ball would not go in, so now we have this opportunity to exit with a good taste in our mouths and say goodbye with a good result."
While Spain are pointless after two games, Morocco did manage a draw with Honduras, meaning a victory could see them progress to the last eight.