The 23-year-old has moved from Porto to Fulham on a free transfer and has signed a three-year contract with the Cottagers.
He told Fulham’s official website: “I am happy to have completed my transfer to Fulham and the Premier League today.
“This is an enormous opportunity for me and I’m looking forward to joining the team and entering the next phase of my development.
“It’s a wonderful challenge for me and I am keen to bring my qualities to Fulham and the Premier League.”