West Ham have signed Goncalo Cardosa from Boavista for a fee believed to be £2.7million.
The 18-year-old Portuguese centre-back passed his medical and has agreed a five-year contract at London Stadium.
Cardosa played 15 times for his club last season and has eight caps for Portugal at Under-19s level.
“I am very excited and it’s a dream come true,” he told West Ham’s official website.Embed from Getty Images
“I always dreamt of coming to England and now I’m here at this big, historic club, so I’m very happy.
“I’m an aggressive player, a little bit different on the pitch than off it. I’m calm, and I like to have the ball and build the game from the back.
“I’m here to work and to help the team reach their goals.”
He becomes the club’s fifth signing of the summer following the arrivals of striker Sebastien Haller, midfielder Pablo Fornals and goalkeepers Roberto and David Martin.
The Irons are expected to add a striker to their ranks before Thursday’s transfer deadline.