nufc.co.ukFiery-headed Jack Colback will undoubtedly have fanned the flames between fans of rivals Newcastle and Sunderland after moving between clubs this summer - and the Black Cats loss is certainly the Magpies gain. Colback is a boyhood Newcastle fan and so will undoubtedly be motivated to be a success at the club, and fortunately he has the ability to match his determination. Players like Colback, who can play either in midfield or at left-back, can often be a victim of their own versatility as they are shifted from one position to another on a regular basis. But he is somebody who will never let the team down, and was consistently amongst Sunderlands top performers, whichever position he played.