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Mark Allen of Northern Ireland competes during the first round match against Lukas Kleckers of Germany at 2017 UK Snooker Championship in York, Britain on Nov. 29, 2017. Mark Allen won 6-2. (Xinhua/Han Yan)

Mark Allen of Northern Ireland competes during the first round match against Lukas Kleckers of Germany at 2017 UK Snooker Championship in York, Britain on Nov. 29, 2017. Mark Allen won 6-2. (Xinhua/Han Yan)