Alvaro Dominguez has completed his move from Atletico Madrid to Borussia Monchengladbach.
Dominguez made more than 70 appearances for the Spanish side in the past four seasons.
"It has been very nice for me to be in this house since I was 13 years old," he told AS.
"I have felt incredible and the last few years we have been able to make Atletico a big club in Europe again. I hope it continues like this and I will continue to feel like an Atleti fan wherever I go.
"I am young, I am ambitious and I want to experience other things and other big leagues. I will always take this club in my heart and I don't have the feeling I am leaving through the back door, I have helped to win two European titles in the past three years.
"I am happy and excited, because Germany is a big opportunity for me. I leave privileged to have been a part of this club and wherever I go I will always have these people and this fanbase with me."