| 1 | Tue 28 Jul | 6 2-2 v Egnatia RrogozhinëCelje 2-2 Egnatia Rrogozhinë | UEFA Champions League Second Qualifying Round |
| 2 | Tue 4 Aug | 61-2 v Ararat ArmeniaArarat Armenia 2-1 Celje | UEFA Champions League Third Qualifying Round |
| 3 | Tue 11 Aug | 6 2-0 v Ararat ArmeniaCelje 2-0 Ararat Armenia | UEFA Champions League Third Qualifying Round |
| 4 | Wed 19 Aug | 61-1 v Slovan BratislavaSlovan Bratislava 1-1 Celje | UEFA Champions League Play-off |
| 5 | Wed 26 Aug | 6 1-2 v Slovan BratislavaCelje 1-2 Slovan Bratislava | UEFA Champions League Play-off |
| 6 | Wed 16 Sep | 60-2 v Bayer LeverkusenBayer Leverkusen 2-0 Celje | UEFA Europa League Matchday 1 |
| 7 | Thu 15 Oct | 6 0-3 v Omonia NicosiaCelje 0-3 Omonia Nicosia | UEFA Europa League Matchday 2 |
| 8 | Thu 22 Oct | 6 2-2 v SV Red Bull SalzburgCelje 2-2 SV Red Bull Salzburg | UEFA Europa League Matchday 3 |
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