Head to Head
| WST Pro Series 2021 | 2021/03/11 11:30 | David Grace v Fergal O'Brien | 2-1 |
Home History
| English Open - Kval 2021 | 2021/09/22 12:00 | Fergal O'Brien v Iulian Boiko | 4-0 |
| Northern Ireland Open - Kval 2021 | 2021/08/23 13:40 | Zhang Anda v Fergal O'Brien | 2-4 |
| British Open 2021 | 2021/08/18 13:40 | Fergal O'Brien v Gary Wilson | 0-3 |
| Championship League Snooker | 2021/08/12 17:25 | Peter Lines v Fergal O'Brien | 2-2 |
| Championship League Snooker | 2021/08/12 16:00 | Ricky Walden v Fergal O'Brien | 3-0 |
| Championship League Snooker | 2021/08/12 12:15 | Mark Allen v Fergal O'Brien | 3-0 |
| Championship League Snooker | 2021/07/20 18:40 | Fergal O'Brien v Mark Lloyd | 3-0 |
| Championship League Snooker | 2021/07/20 14:25 | Michael Holt v Fergal O'Brien | 2-2 |
Away History
| English Open - Kval 2021 | 2021/09/20 17:45 | David Gilbert v David Grace | 4-2 |
| Northern Ireland Open - Kval 2021 | 2021/08/27 12:15 | Jimmy White v David Grace | 0-4 |
| British Open 2021 | 2021/08/19 13:45 | Oliver Lines v David Grace | 3-0 |
| British Open 2021 | 2021/08/17 09:35 | David Grace v Mark Lloyd | 3-2 |
| Championship League Snooker | 2021/07/22 17:15 | Ben Fortey v David Grace | 1-3 |
| Championship League Snooker | 2021/07/22 16:00 | David Grace v Bai Langning | 0-3 |
| Championship League Snooker | 2021/07/22 11:00 | David Grace v Farakh Ajaib | 3-0 |
| VM - Kval 2021 | 2021/04/09 13:30 | David Grace v Steven Hallworth | 3-6 |