This Sunderland teen is attracting interest from some of Europe’s biggest clubs, including Manchester United. Sunderland have several exciting, young players on their books, but perhaps none more so than Chris Rigg. The 16-year-old academy graduate made his first-team debut last season and has since made his Championship debut for the Black Cats this time round. Rigg scored his first-ever professional goal in a Carabao Cup clash vs Crewe Alexandra at the start of the season, becoming the club’s youngest-ever scorer, and he’s since featured seven times in the league with one goal to his name. N…