Williams needs remarkable comeback in final against Zhao Xintong

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Welshman Mark Williams will have to stage a remarkable comeback if he's to win a fourth Crucible title and become the oldest player to win the World Snooker Championship.

The 50-year-old trails China's Zhao Xintong by 11 frames to 6 after the first day's play.

Victory for Zhao would make him only the third qualifier to go on and lift the trophy.