Radamel Falcao was close to joining Real Madrid, which was believed to be his preferred destination. But he eventually went to Manchester United on a season-long loan.
"Everybody has heard about that team," Falcao told reporters. "I don't want to talk about them.
"I am very happy here, I believe in this project, I think United is the best club for my style of play and I am sure of my decision. I am sure that, in the future, it will be great for us."
Falcao previously played in Madrid for Atlético.
"I am very happy to be here. It's a big challenge for me, for my career, I always dreamed of being at a club like Manchester United.
"I hope to stay many years at Manchester United and make history at this club. When I was at Porto, Atletico Madrid, I always wanted to improve and I dreamed of playing at a team like this - and now I want to stay here for many years."