| World Championship Qual 2021 | 04/10 18:30 | 9 | Robert Milkins v Joe O'Connor | 6-5 | |
| World Championship Qual 2021 | 04/08 08:30 | 8 | Joe O'Connor v Fraser Patrick | 6-2 | |
| WST Pro Series 2021 | 03/14 20:30 | 1 | Joe O'Connor v Lukas Kleckers | 2-0 | |
| WST Pro Series 2021 | 03/14 18:40 | 1 | Mark Selby v Joe O'Connor | 2-0 | |
| WST Pro Series 2021 | 03/14 17:00 | 1 | Matthew Selt v Joe O'Connor | 2-0 | |
| WST Pro Series 2021 | 03/14 15:30 | 1 | Joe O'Connor v Daniel Womersley | 2-0 | |
| WST Pro Series 2021 | 03/14 13:30 | 1 | Joe O'Connor v Stuart Carrington | 0-2 | |
| WST Pro Series 2021 | 03/14 11:30 | 1 | Joe O'Connor v Eden Sharav | 0-2 | |
| WST Pro Series 2021 | 03/14 10:00 | 1 | Joe O'Connor v Soheil Vahedi | 0-2 | |
| Gibraltar Open 2021 | 03/02 11:30 | 7 | Jimmy White v Joe O'Connor | 4-3 | |
| Welsh Open 2021 | 02/18 10:00 | 9 | Mark Selby v Joe O'Connor | 4-3 | |
| Welsh Open 2021 | 02/17 10:00 | 8 | Joe O'Connor v Andrew Higginson | 4-1 |