Borussia Dortmund, Bayer Leverkusen chasing Sunderland whiz Chris Rigg

And it's suggested the England U17 captain could be willing to depart this summer.

Manchester United have been watching Rigg, who rejected an offer from Newcastle before signing pro terms with the Black Cats.

Rigg is the youngest Sunderland debutant at 15 and also their youngest goalscorer.