|Venue: Alexandra Palace, London Dates: 8 January -15 January|
|Coverage: Watch live on BBC TV and Red Button with uninterrupted coverage on BBC iPlayer, the BBC Sport website and the BBC Sport app|
The world number one won 6-1 against Luca Brecel at the Masters.
On his way to victory, the 'Rocket' made breaks of 53, 97, 134, 104 and capitalized on several mistakes by the Belgian.
Mark Williams or David Gilbert will face O' Sullivan in the last eight.
There are two first-round matches on Monday.
O'Sullivan said he tried to make the most of Luca's uneasiness and punish every mistake he made.
You have gained a lot of experience at 47 and you have to use it. You are expected to play well by 2,000 people.
I'm having a good time. I don't care, but there is a very good competitor there. The players will always expect me to come back for more. I haven't left yet.
An enthusiastic London crowd gave an enthusiastic London crowd plenty to cheer as he opened up by nearly making a century in the first frame.
The 47-year-old was able to tidy up as Brecel gave him the second andthird frames.
The mistake of going from brown to blue cost Brecel.
A loose pot on the blue saw the white fly into the middle pocket and with it his hopes of taking the third frame.
While Brecel responded with a brilliant century break of his own to reduce his arrears to 3-1 at the mid-session interval, an error on his break-off shot was punished with O' Sullivan making the highest break of the tournament so far with a 134.
O'Sullivan had a century and a half before the end of the game.