United are one of four Premier League sides that have reportedly held talks about the 18-year-old with Crewe - the others being Arsenal, Liverpool and Everton.
A proposed bid from Manchester City has never materialised, and now United are firm favourites to wrap up a deal.
Dynamic forward Powell had a hugely impressive campaign for Alex - helping them to promotion to League One via the play-offs in which he netted a stunning goal against Cheltenham in the final at Wembley.
Reports claim that the transfer is '90 per cent' done and that barring any last-minute hitches United will clinch his signing.
It is also understood that the deal could be worth as much as £8m based on appearances and achievements.
The Nike Hypervenom is the latest cleat silo from Nike. It will change your game and is worn by the game's top players.
The hoop soccer jersey is classic and cool. The USA hooped jersey is perfect for every fan. Get in the Gear.
Neymar's move from Santos to Barcelona is no doubt the biggest summer transfer.
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
England will debut their new away jersey against Brazil at the Maracana Stadium on Sunday. Get in the Gear
Barcelona will wear this new home soccer jersey next season. They also have a new away jersey. Get them both.
Support the USA national team with an official 2013 Centennial soccer jersey from Nike. Its Official.
Jamaica is in need of a win against the U.S. Get the jersey of the Reggae Boyz.
Manchester City will try and win back the Premier League title with this new soccer jersey from Nike!
Germany is one of the top teams ever and they will play the US on Sunday.