Ronnie O’Sullivan struggling to spark in Stuart Bingham Crucible quarter-final

Ronnie O’Sullivan is battling to find his best form in Sheffield (Picture: Getty Images)Ronnie O’Sullivan and Stuart Bingham are locked at 4-4 after the first session of their World Snooker Championship quarter-final, with neither hitting top form.The Rocket has not really found his best stuff yet this tournament and that continued on Tuesday afternoon.Bingham settled early, taking the first two frames with two half-centuries, then make another one in the third but broke down and O&r