Sunderland fans are in dreamland after their perfect start to the Championship campaign, with much of their start owed to players already at the club. Regis Le Bris has inherited a squad full of exciting talents, helping him settle into life at the Stadium of Light with relative ease. Le Bris is calling for his youthful Sunderland side to remain concentrated after their incredible start, but it would be understandable if fans couldn’t contain themselves. Two of last season’s incomings, Romain Mundle and Eliezer Mayenda, have electrified Championship defences in the opening weeks. With Jobe Bel…