Learn English: O'Sullivan's Health Concerns Force Him to Skip Tournament (normal)

Ronnie O'Sullivan, one of the best snooker players ever, has withdrawn from the Northern Ireland Open due to medical reasons.

This is his third tournament in a row that he's had to miss because of health issues.

He last played in the English Open, where he lost early on.

O'Sullivan is hoping to compete again in China at the International Champions event next month.