The Wayback Machine - https://web.archive.org/web/20210427090109/https://www.bbc.co.uk/sport/av/snooker/56867002

World Snooker Championship 2021: Mark Williams controversial break-off shot

Steve Davis and Alan McManus analyse the controversial "roll up" break-off that Mark Williams has recently been using after the sport's governing body wrote to players canvassing their opinions about the shot.

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