BBC Sport's John Parrot and Steve Davis attempt to explain a controversial decision by referee Jan Verhaas at the UK Championship semi-final to not call a miss because Ronnie O'Sullivan had touched a ball and subsequently to move the white ball.
(較少)
Former world champion: Ronnie O'Sullivan makes a break of 104 during his match against Mark Selby, during the quarter final stage of the 2009 UK Snooker Championships, at Telford
(較少)
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