Head to Head
| Gibraltar Open 2019 | 2017/11/16 11:30 | Ronnie O'Sullivan v Mark Williams | 5-1 |
| 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
| World Championship 2020 | 2020/08/07 09:00 | Mark Williams v Stuart Bingham | 13-11 |
| World Championship 2020 | 2020/07/31 18:00 | Mark Williams v Alan McManus | 10-5 |
| Gibraltar Open 2020 | 2020/03/15 15:00 | Kyren Wilson v Mark Williams | 4-0 |
| Gibraltar Open 2020 | 2020/03/15 12:10 | David Grace v Mark Williams | 1-4 |
| Gibraltar Open 2020 | 2020/03/15 09:00 | Tian Pengfei v Mark Williams | 3-4 |
| Gibraltar Open 2020 | 2020/03/13 20:10 | Martin Gould v Mark Williams | 1-4 |
| Gibraltar Open 2020 | 2020/03/13 17:45 | Zhou Yuelong v Mark Williams | 2-4 |
| Gibraltar Open 2020 | 2020/03/13 13:55 | Mark Williams v Kacper Filipiak | 4-3 |
Away History
| World Championship 2020 | 2020/08/09 18:00 | Ding Junhui v Ronnie O'Sullivan | 10-13 |
| World Championship 2020 | 2020/08/07 18:00 | Ding Junhui v Ronnie O'Sullivan | 10-13 |
| World Championship 2020 | 2020/08/02 13:30 | Ronnie O'Sullivan v Thepchaiya Un-Nooh | 10-1 |
| Championship League Snooker | 2020/06/09 18:30 | Ronnie O'Sullivan v Stuart Bingham | 0-3 |
| Championship League Snooker | 2020/06/09 17:30 | Ronnie O'Sullivan v Sam Craigie | 3-1 |
| Championship League Snooker | 2020/06/09 14:00 | Ronnie O'Sullivan v Harvey Chandler | 3-0 |
| Championship League Snooker | 2020/06/05 20:10 | Ronnie O'Sullivan v Chris Wakelin | 3-0 |
| Championship League Snooker | 2020/06/05 19:15 | Ronnie O'Sullivan v Michael Georgiou | 3-0 |