Ken Doherty believes Ronnie O’Sullivan will have to up his level further if he is to truly contend at the business end of the World Snooker Championship. The Rocket returned from a three-month hiatus with an impressive 10-4 victory over Ali Carter in the first round as he goes in search of a record eighth world title at the crucible.

When does Ronnie O’Sullivan play next at the World Snooker Championship? - The seven-time world champion will return to the Crucible for a second round match against Pang Junxu