He told The Athletic: “I’ve felt very wanted and appreciated, which is important for any footballer. Chelsea are a huge football club, one of the biggest in the world, along with Atletico. But I have taken that exciting step of playing Champions League football and challenging for trophies. It just builds me with even more confidence and happiness to play my best football.
“It was just (being) full of excitement to be joining Atletico. When I look back at my memories at Chelsea, I’m very proud and honoured to play for the club. It was time to move on and Atletico is the perfect club to make the next chapter in my career. I feel very lucky and fortunate to be in this position.”
On being announced as a "pitbull" during his signing ceremony, he added: “I think that [nickname] was something Atletico made up. Some people in England call me a dog, because of how I play on the pitch. Sometimes I just run after every ball, like a dog does in the park. It kind of stuck. (Atletico) took it from there. I don’t mind. I take it as a compliment.”