The former Real Madrid coach's appointment was announced yesterday ahead of his presentation.
Lopetegui was asked why he accepted the offer from Sevilla sports chief Monchi.
"Because I come to a big and ambitious team, which has shown me the ambition to remain great. That ambition and that conviction is what has brought me here," he said.
"The people who are in the club are also very important in my decision. I want to be here.
"It's a huge dream, we are full of energy to shape the project, we want to help make Sevilla a little bit bigger and that will be our determination, it's little talk and a lot of work from now on.
"I came here as a rival and I do not have the slightest doubt that this passion that I have suffered as a rival I am going to enjoy now as a local.
"I have no doubt that Sevilla will push to get as high as possible (on the table)."