Nani is excited about the prospect of playing alongside Portugal teammate Cristiano Ronaldo at Manchester United.
"To play in the same team as Cristiano again will be fantastic," he said.
"We played together for quite a long time and having Cristiano here had a lot to do with me deciding to join as well.
"I know how successful he has been at Manchester United and how well he has been playing. That has given me a great incentive to do the same."