Most of the world’s top players will compete for the £150,000 top-prize in Shanghai.
Number one seed and 2016 winner Ding Junhui withdrew from the competition yesterday through illness.
The Asian superstar has only won one match since the start of October.
However, number two seed Mark Selby will face Ian Burns this morning as he looks to take advantage of Junhui’s absence.
O’Sullivan fans will have to wait until Wednesday to see him return to action.
The Rocket’s last success at the Shanghai Masters came in 2009.
And he will be as hungry as ever, especially after suffering a Champion of Champions final defeat to Shaun Murphy on Sunday.
And after his latest loss, O’Sullivan said: “I just want to say well done to Shaun.
“In the last three frames I got rhythm and made a match of it but he deserved victory and played better today.”
Live scores and updates
All matches are best of nine frames and based on UK times.
Monday November 13
01:30 Billy Joe Castle 5-2 Zhang Jiankang
01:30 Li Zhen v Chen Feilong
01:30 Soheil Vahedi v Ma Chunmao
01:30 Tom Ford v Jimmy Robertson
01:30 Lee Walker v Kurt Maflin
01:30 Ryan Day v Yu De Lu
01:30 Yan Bingtao 1-5 Mark Allen
01:30 Jack Lisowski 5-1 Chris Totten
06:30 John Higgins v Alexander Ursenbacher
06:30 Liang Wenbo v Rod Lawler
06:30 Fergal O’Brien v Mitchell Mann
06:30 Mark King v Jamie Jones
06:30 Michael Georgiou v Ben Woollaston
06:30 Zhou Yuelong v Sanderson Lam
06:30 David Gilbert v Mark Joyce
06:30 Wang Yuchen v Mark Williams
11:30 Ding Junhui v w/o Mei Xi Wen
11:30 Rory McLeod v Winner of match 1
11:30 Stuart Carrington v Winner of match 2
11:30 Sam Baird v Winner of match 3
11:30 Mark Selby v Ian Burns
11:30 Graeme Dott v Xiao Guodong
11:30 Robert Milkins v Lyu Haotian
11:30 Michael White v Mark Davis
Tuesday November 14
01:30 Alfie Burden v Judd Trump
01:30 Barry Hawkins v Daniel Wells
06:30 Cao Yupeng v Michael Holt
06:30 Yuan SiJun v Robbie Williams
06:30 Winner of Match 7 v Ian Preece
06:30 Winner of Match 8 v John J Astley
06:30 Akani Songsermsawad w/o v Stuart Bingham
06:30 Joe Perry v Matthew Selt
06:30 Dominic Dale v Alan McManus
06:30 Chris Wakelin v Winner of Match 10
11:30 Mei Xi Wen v Adam Duffy
11:30 Luca Brecel v Matthew Stevens
11:30 Winner of Match 5 v Stephen Maguire
11:30 Winner of Match 6 v Ali Carter
11:30 Li Yuan v Martin Gould
11:30 Hossein Vafaei v Marco Fu
11:30 Winner of Match 9 v Gerard Greene
Wednesday November 15
01:30 Ronnie O’Sullivan v Gary Wilson