When speaking about the best young talents, JJ Gabriel will pop up in the minds of many Manchester United supporters.

He has been predicted to make his senior debut this season and is widely regarded as United's greatest and brightest potential.

However, he could have already established himself in the senior ranks, if not for age constraints and United's terrible run of first-round exits from every available cup competition last season.

Carrick and Darren Fletcher have both mentioned Gabriel's enormous potential, and he has frequently trained with the first team. He was recently called "generational talent" by Ryan Giggs.

The question always had been, "When will JJ Gabriel make his debut?" not if he would ever leave.

Roundtable understands that JJ Gabriel has had an offer from an unidentified club which he is considering.

Gabriel’s father is understood to be playing a major part in the sudden news, with one source has describing him as a ‘cancer’ to deal with for an extended period.

It is understood that this offer isn’t solely down to money, with United staff left in shock over the recent news as they wouldn’t be beaten on the financial side.

United had made huge plans for the 15-year-old and offered him perks that they had never done for any other player in their history.

United sources insist that they have not given up hope of turning the situation around, and talks will continue to see if there is any resolution.

JJ Gabriel was in line to make his senior debut in tomorrow’s cup fixture against Brighton & Hove Albion F.C., but it seems he won’t be involved following the shocking news this morning.

He was very clearly United’s best talent in their academy, and losing him would be massive.

Max Dowman of Arsenal became the youngest goal scorer in Premier League history at the age of sixteen. Rio Ngumoha, who made his senior England debut before turning eighteen, is the youngest goalscorer in Liverpool's history.

United will be gutted to potentially lose Gabriel.

This is a developing story. More to follow.