![Ronnie O'Sullivan beats Mark Williams to reach semi-final of Snooker World Championship](https://cdn.newsserve.net/ONPglobe256.png)
Ronnie O'Sullivan beats Mark Williams to reach semi-final of Snooker World Championship
Watch the five best shots from Ronnie O'Sullivan's quarter-final win over Mark Williams as he reaches the semi-final of the Snooker World Championship.
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