Mark Williams of Wales competes during the Quarter Final match with Ronnie O'Sullivan of England at the Snooker UK Championship in York, Britain on Dec. 2, 2016. O'Sullivan won 6-2. (Xinhua/Jon Buckle)
Mark Williams of Wales competes during the Quarter Final match with Ronnie O'Sullivan of England at the Snooker UK Championship in York, Britain on Dec. 2, 2016. O'Sullivan won 6-2. (Xinhua/Jon Buckle)