Leeds United coach on 'extremes' of Marcelo Bielsa and Jesse Marsch as Whites prepare for return

As Under 23s boss during Bielsa's reign, Jackson was tasked with employing the same high-intensity pressing style and man-to-man marking system that young players would be required to fit into at first team level when they made the jump.

Jackson credited the Argentine for opening his eyes to minute details and the 'phenomenal' work that can be done to prepare a team for matchday.