Shaqueel van Persie, seven and Harvey Neville, 11, are apparently training with Manchester City's academy in their bid to hit the big time.
According to the Manchester Evening News, it is not obvious why Dutch forward Van Persie or coach Neville - who played for Sir Alex Ferguson's United between 1995-2005 after coming through the Old Trafford youth ranks - have endorsed their boys' decision to train with City.
After a weekend when United were thumped by their other bitter rivals in the form of Liverpool, it is enough to have any Red Devil reaching for a large glass of Fergie's favourite wine.
Arsenal were apparently once interested in landing Van Persie's boy.
A quote in the Manchester Evening News says there remains a level of amazement about the decision.
"There's quite a bit of surprise about it. You would have thought that if they were going to be with anyone it would have been United."
Van Persie has already spoke highly of his son's ability during his days leading Arsenal's forward line.
"I honestly have to say that he has got a lot of talent for football," he said.
"I recognise a lot of stuff of myself in him. His coach is really great. Arsenal has invited him a couple of times to come and play there but he likes it at his club.
"He's sensitive for a good atmosphere. Just like me."
- Sports & Recreation
- Phil Neville
- Robin van Persie
- Manchester City
- Manchester United
- Manchester Evening News
- Sir Alex Ferguson