Despite his resignation, Duff may be returning to London and the Premier League with Brentford showing interest in him. The club is in the process of finding a new manager, with Keith Andrews reportedly in advanced talks for the position following Thomas Frank's departure to Tottenham.

According to reports, Duff could join Andrews' coaching staff at Brentford. This would bring together two former Republic of Ireland teammates, who also worked together as assistant coaches under Stephen Kenny's leadership.