Nani, who has been likened to United star Ronaldo, will snub interest from clubs across Europe in order to achieve his dream move to Old Trafford.
Sir Alex Ferguson is an admirer of the 20-year-old and is thought to be ready to trigger a £17.5million clause in Nani's contract.
Nani came through the same youth system as Ronaldo at Sporting and wants to join his friend in the Premiership.
The Portuguese youngster is determined to make the move to United and has snubbed the opportunity to sign for Atletico Madrid.
"I'll only leave Portugal to play for a club like United," Nani told the Daily Mirror.
"The Premiership is spectacular and to be the next Cristiano would be a dream."