Mark Selby believes again after mental health turnaround since last year’s Crucible nightmare

Mark Selby is back and vastly improved from a year ago (Picture: Getty Images)Mark Selby arrives at the Crucible this year in completely contrasting mood to how he landed in Sheffield 12 months ago, believing again that he can conquer the world.The four-time world champion was beaten in the opening round at the Crucible last year amid a torrid time for his game and mental health.Selby was talking about retirement before he got to Sheffield and an early defeat to debutant Joe O’Connor did