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Scotland's John Higgins competes during the first session of his quarter final match against Australia's Neil Robertson at World Snooker Championship 2019 in Sheffield, Britain on April 30, 2019. (Xinhua/Jon Super)
Scotland's John Higgins competes during the first session of his quarter final match against Australia's Neil Robertson at World Snooker Championship 2019 in Sheffield, Britain on April 30, 2019. (Xinhua/Jon Super)