A former Premier League manager fancied by Sunderland this year has rejected an offer from a Championship club. Sunderland remain without a manager, and there’s growing concern among supporters ahead of the pre-season and summer transfer window. The Black Cats appear to be missing out on several managerial targets; Bo Svensson has recently taken charge of Union Berlin, whilst Danny Rohl has penned a new deal with Sheffield Wednesday. A move for Will Still appears to be up in the air following links to Norwich City last week, but the Canaries appear to have other names higher up on their list. …