"It brings me immense joy to sign for Chelsea. I struggled to sleep last night ahead of the journey here because I was so excited," Guiu said in his first interview with the club's official website.
"Ever since I was small, it was my dream to play in the Premier League and be successful in England. Now I have the opportunity to join Chelsea and I will work my hardest to be successful for the club. I think what's most important [to start with] is that I adapt to my surroundings, which I'm sure will be easy, and then of course I want to win the Champions League and the Premier League for Chelsea.
"On a personal level, I want to help the team as much as I can by scoring lots of goals and I want to become the best centre forward in the world."