“Seventeen years – nobody has done it, so let’s say with amazing players, [I am] probably a legend of the club.
“This is what I’ve always dreamed for. Today is the day it happened. I am the happiest man in the world.”
Spurs signed Son for a reported £22m after he scored 29 goals in 87 appearances for Leverkusen.
He came off the bench in the 67th minute against United to replace the injured Richarlison, his 454th appearance for Tottenham.
South Korea were beaten in the 2015 Asian Cup final, while Tottenham lost in the- the 2019 Champions League final and the 2021 Carabao Cup final.
“I felt the pressure,” Son said.
“I wanted it so badly. In the past seven days I was dreaming about this game every night. It finally happened and I can sleep easy now.”
