Ronnie O'Sullivan was in a mischevious mood last night.
The Rocket was storming past Matthew Stevens at the World Championship in Sheffield when he uncharacteristically missed a pot on the black ball during the night's final frame.
Referee Olivier Marteel had to censure the snooker legend for an "obscene gesture" he made afte the miss, and he risks being docked a frame in the championship if he makes another misdemeanour.
O'Sullivan currently leads 12-4 in the match.
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