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Page last updated at 19:57 GMT, Tuesday, 20 April 2010 20:57 UK

Referee error cuts short a Ronnie O'Sullivan break

Ronnie O'Sullivan and Colin Humphries

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Ronnie O'Sullivan plays on as referee Colin Humphries mistakenly replaces a red instead of the black, resulting in a foul and ending a break of 53 from the world number one during his first round world championship win over Liang Wenbo. O'Sullivan went on to win the match 10-7.

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