O'Sullivan arrived at the table on Monday morning knowing he only needed two further frames to book his place in the next round, having played fantastically to hold an 8-1 lead at the close of play on Sunday.
And he soon set about his business, punishing an Un-Nooh miss on a routine red to ensure that an earlier error of his own on the black was not costly.
In what proved to be the final frame of the match, The Rocket briefly threatened to record a maximum. He was unable to do so but, at 108 minutes, he now holds the record for the quickest-ever Crucible victory.
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Watch Ronnie O'Sullivan close out record-breaking win at World Snooker Championship

I always think if I can play quick and with accuracy, that’s when I’m at my best. It also makes my opponent a little bit weary, hesitant, off their stride, because everything can happen so quickly,” he said after his win.
“If I can play like that I’ve got a great chance, especially as I get a bit older, because obviously I don’t pot as well as I used to.
“You just have to play to your strengths. My greatest asset is that I’m able to take my practice form to the match table, I’ve always played better in matches that I have in practice. It’s not something I have to work on, I don’t always play well but I enjoy the battle.”

'That was Ronnie O'Sullivan at his absolute best' - Jimmy White analysis of Rocket's amazing display

O'Sullivan is also relishing the "tranquillity" at the Crucible, although he was slightly surprised by the fake crowd noise used during his sessions.
He added: “I wish they’d have told me! I thought the building was falling apart. I thought we’ve got Covid-19 and now all of a sudden the Crucible is about to get imploded. I thought ‘What was going on back-stage there?’ and he [the referee] told me it’s just fake crowd noise. I thought, ‘ah right, cool’.

Ronnie O'Sullivan: My life has been about quiet and simple

On the behind-closed-doors aspect he added: “Phil Taylor was texting me and he says he’s been self-isolating for 30-odd years. It’s true. When you play sport and you have the crowds, you kind of want to get away from that.
My whole life has been about keeping it quiet and as simple as I can, that’s why I’m into running and cooking, a lot of stuff at home. I don’t go out to restaurants, takeaways are fantastic for me, it’s kind of how I’ve lived my life – now I can go to snooker tournaments and still have that tranquillity.

McGill edges thriller

Anthony McGill edged a first-round thriller against 13th seed Jack Lisowski on Monday night.
Lisowski trailed 9-6 but battled back to force a nail-biting decider, which McGill eventually won after sinking the final blue before potting the pink.
It was a fraught finale fitting of a fine match-up. It had been 6-6 at one point, with McGill building a sizeable lead only for Lisowski to close it up once more.
McGill will be grateful blue wobbled and then dropped in – he now faces a second round meeting against Mark Allen or Jamie Clarke.

Bingtao sees off spirited Slessor

Elsewhere, Yan Bingtao held off a spirited comeback from Elliot Slessor to win the match 10-7.
Bingtao had led 9-2 and was seemingly heading for a straightforward victory before a foul let Slessor make it 9-3.
Slessor won five frames in a row, but a nervy Bingtao finally got over the line to book a second-round meeting with defending champion Judd Trump.
The other afternoon session saw 10th seed Shaun Murphy get off to a shaky start, with Noppon Saengkham leading 6-3.

O'Sullivan First Session Report

The five-time champion O'Sullivan reeled off two century breaks and averaged less than 14 seconds a shot as he raced into an 8-1 lead.
The only blemish for O’Sullivan came in the seventh frame when Un-Nooh got on the board.
Un-Nooh won his only previous meeting with O’Sullivan in 2014 but it was clear from the early stages that he was in for a tough afternoon at the Crucible.

Ronnie O'Sullivan opens with magnificent century break against Thepchaiya Un-Nooh

By the first interval he trailed 4-0 as O’Sullivan reeled off breaks of 101, 85, 115 and 74 in just 40 minutes.
The Rocket followed up with two more quickfire frames after the interval before Un-Nooh got himself on the scoreboard in the seventh frame.

World Snooker Championship: Magic from Ronnie O'Sullivan as he pots nonchalant double

But a lucky red helped O’Sullivan move further ahead and he closed out a dominant session with a break of 65 to secure a commanding advantage.

World Snooker Championship: Ronnie O'Sullivan benefits from amazing fluke

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