Head to Head
| UK Championship | 2016/12/02 19:00 | Mark Williams v Ronnie O'Sullivan | 2-6 |
| Championship League Snooker | 2016/01/04 12:00 | Ronnie O'Sullivan v Mark Williams | 3-2 |
Home History
| Gibraltar Open 2019 | 2017/11/16 04:00 | Barry Hawkins v Ronnie O'Sullivan | 0-5 |
| Gibraltar Open 2019 | 2017/11/15 11:30 | Ronnie O'Sullivan v Joe Perry | 5-1 |
| Gibraltar Open 2019 | 2017/11/15 01:30 | Ronnie O'Sullivan v Gary Wilson | 5-2 |
| Champion of Champions | 2017/11/12 13:00 | Ronnie O'Sullivan v Shaun Murphy | 8-10 |
| Champion of Champions | 2017/11/10 19:00 | Anthony Hamilton v Ronnie O'Sullivan | 2-6 |
| Champion of Champions | 2017/11/09 19:00 | Ronnie O'Sullivan v John Higgins | 6-0 |
| Champion of Champions | 2017/11/09 13:00 | Ronnie O'Sullivan v Neil Robertson | 4-1 |
| Gibraltar Open 2019 | 2017/10/30 11:30 | Ronnie O'Sullivan v Yan Bingtao | 1-6 |
Away History
| Gibraltar Open 2019 | 2017/11/16 04:00 | Mark Williams v Mark Selby | 5-3 |
| Shanghai Masters | 2017/11/15 11:30 | Mark Williams v Gerard Greene | 5-0 |
| Gibraltar Open 2019 | 2017/11/13 06:30 | Wang Yuchen v Mark Williams | 1-5 |
| Gibraltar Open 2019 | 2017/11/01 11:30 | Mark Selby v Mark Williams | 6-4 |
| Gibraltar Open 2019 | 2017/10/31 11:30 | Ryan Day v Mark Williams | 2-6 |
| Gibraltar Open 2019 | 2017/10/30 11:30 | Mark Williams v Yu Delu | 6-4 |
| Gibraltar Open 2019 | 2017/10/19 09:00 | Mark Williams v Jack Lisowski | 2-4 |
| Gibraltar Open 2019 | 2017/10/18 13:15 | Luca Brecel v Mark Williams | 1-4 |