The 19-year-old Brazilian has been on United managers shopping list for much of the summer as he desperately searches for midfield reinforcements ahead of the new Premier League season.
Having been forced to rely upon the ageing Paul Scholes and Ryan Giggs last term the 70-year-old dispatched chief scout Jim Lawlor to broker a deal for the Sao Paulo star, who is also a target for Chelsea, Real Madrid and Inter Milan.
The Red Devils are said to be close to capturing Moura’s signature but Ferguson denied that the transfer, thought to be worth £26 million, has been finalised.
He said: “It’s not correct. We haven’t reached an agreement for the player.
“We have shown an interest, but until such time we get a deal agreed, we can’t say he’s our player.”
The player is currently in London with the Brazil squad preparing for the Olympics next month and played the final 22 minutes of the 2-0 win over Great Britain at the Riverside Stadium on Friday night.
Ferguson acknowledged that he is an admirer the teenager’s talents but maintained he is only one of a series of potential targets as he looks to construct a squad capable of wrestling the title back from fierce rivals Manchester City.
Having already signed Shinji Kagawa and Nick Powell he wants at least two more players to boost his numbers with a left back and striker said to be his top priorities.
He said: “We’ve signed two players in the summer: [Shinji] Kagawa and [Nick] Powell. We think they both have fantastic potential.
“At this moment, we’re looking at other options in terms of bringing other players in.
“We’re not lying on our backsides doing nothing. We’re trying hard to bring other players to the club.”