The Spanish giants won the competition for a record sixth time by beating Inter 3-2 in the showpiece event in Germany.
Sevilla saw off Manchester United 2-1 in the semi-finals to set up the clash with the Italian giants, who thrashed Shakhtar Donetsk 5-0 in their last-four tie.
Sevilla held on for a famous 3-2 victory, and Lopetegui paid tribute to two-goal hero De Jong and the rest of his squad for their never-say-die attitude.
“It is very special. Always it is very special to win a cup,” the 53-year-old told reporters. “For us, for me, for the fans, it is very special. We have a happy ending.
“Luuk de Jong is a very good player, he worked for his moment and he was ready in the right moment.
“We had three penalties in the last three matches in the first five minutes but our team never surrenders.”