Sir Alex Ferguson says Manchester United are keen on signing Freddy Adu.
Chelsea have also been linked with 17-year-old Adu
The 17-year-old American is due at United for a two-week trial and could sign in the January transfer window.
Asked if he was interested in signing the DC United forward, Ferguson said: "I think so, he's only young but we have known of him for a long time.
"We tried to get him here some years ago but he signed for DC United and that stopped the progress of us keeping tabs on him."
United initially rejected reports that Adu would visit Old Trafford, however, it has now emerged that negotiations are under way.
Adu has also been linked with Chelsea and could be available in January, providing a fee can be agreed with MLS, who own his registration.
DC United's domestic season ended at the weekend after they lost a play-off at the hands of New England Revolution.
After the game Adu said there had been "some serious talks" that could lead to him playing elsewhere next year and his comments heightened speculation over his future.
"I'd like to be back but my ultimate goal is to go overseas and if it comes sooner rather than later, I'll take it," he added.
Adu has played three seasons for DC United, having joined them at the age of 14.
Although there is only one year remaining on his contract with MLS, there is an option for two more for the Ghana-born player, who has been hailed as the great hope of American soccer.