
England's Ronnie O'Sullivan competes during the first session of the quarterfinal match against China's Ding Junhui at the World Snooker Championships 2017 at the Crucible Theatre in Sheffield, Britain, on April 25, 2017. (Xinhua/Han Yan)

England's Ronnie O'Sullivan competes during the first session of the quarterfinal match against China's Ding Junhui at the World Snooker Championships 2017 at the Crucible Theatre in Sheffield, Britain, on April 25, 2017. (Xinhua/Han Yan)