 Northern Ireland: NIFL Premiership - Main |
|---|
| 15. Round | Warrenpoint | Glentoran | POSTP. | details | 16.01.2021 |
| 13. Round | Glentoran | Cliftonville | POSTP. | details | 12.01.2021 |
| Northern Ireland: Irish Cup - Main |
|---|
| 1/16-finals | Glentoran | Dundela | POSTP. | details | 09.01.2021 |
| Northern Ireland: NIFL Premiership - Main |
|---|
| 12. Round | Linfield | Glentoran | POSTP. | details | 09.01.2021 |
| 14. Round | Glentoran | Portadown | 2:1 (2:0, 0:1) | details | 02.01.2021 |
| 11. Round | Ballymena | Glentoran | 1:1 (0:0, 1:1) | details | 19.12.2020 |
 World: Club Friendly - Main |
|---|
| | Glentoran | Warrenpoint | 3:0 (2:0, 1:0) | details | 25.09.2020 |
| | Glentoran | H&W Welders | 7:0 (3:0, 4:0) | details | 19.09.2020 |
| | Glentoran | Ards | CAN. | details | 15.09.2020 |
| | Glentoran | Portadown | 3:1 (1:0, 2:1) | details | 15.09.2020 |
| | Glentoran | Bangor FC | 6:2 (3:1, 3:1) | details | 12.09.2020 |
 Europe: Europa League - Qualification |
|---|
| 1/8-finals | Motherwell | Glentoran | 5:1 (0:0, 5:1) | details | 27.08.2020 |
| Europe: Europa League - Preliminary |
|---|
| Final | Glentoran | HB Torshavn | 1:0 (1:0, 0:0) | details | 20.08.2020 |
| Northern Ireland: Irish Cup - Main |
|---|
| Final | Ballymena | Glentoran | 1:2 ET (0:1, 1:0, 0:1) | details | 31.07.2020 |
| Semi-finals | Cliftonville | Glentoran | 1:2 PEN. (1:1, 0:0, 0:0, 6:7) | details | 27.07.2020 |
| Quarter-finals | Glentoran | Crusaders | 2:1 (0:1, 2:0) | details | 29.02.2020 |
| 1/8-finals | Queens Univ. | Glentoran | 2:3 (2:2, 0:1) | details | 01.02.2020 |
