Diaz told Movistar+: "I am very happy to be at this great club. There have been talks [with Barca], as is usual in the market, with several teams. I made an objective decision about my future, and the most important thing is that I'm coming to a great club. So I'll try to do my best."
Diaz, on his win against Chelsea, said: "I'm very happy with the win; it lives up to our expectations. A start like this is important for the team to stay calm. Now it's time to rest."