A Championship rival chief has given an update on their pursuit of one Sunderland target. Sunderland will be desperate to bolster their attack this summer, with big expectations on their shoulders if Jack Clarke is to leave. The winger could gift the Black Cats millions in profit as they look to replace him, but finding a player to gift them a similar return to Clarke could be a real challenge. While Sunderland are looking to appoint a new manager before they get their transfer business underway, they have already been linked with potential replacements for their star man. The Wearside outfit …