| 1 | Thu 22 Aug | 42-1 v HäckenHäcken 1-2 1 FC Heidenheim | UEFA Europa Conference League Play-off |
| 2 | Thu 29 Aug | 43-2 v Häcken1 FC Heidenheim 3-2 Häcken | UEFA Europa Conference League Play-off |
| 3 | Sun 1 Sep | 44-0 v FC Augsburg1 FC Heidenheim 4-0 FC Augsburg | German Bundesliga |
| 4 | Thu 3 Oct | 42-1 v Olimpija Ljubljana1 FC Heidenheim 2-1 Olimpija Ljubljana | UEFA Europa Conference League Matchday 1 |
| 5 | Thu 24 Oct | 41-0 v PafosPafos 0-1 1 FC Heidenheim | UEFA Europa Conference League Matchday 2 |
| 6 | Sat 2 Nov | 4 0-1 v Holstein KielHolstein Kiel 1-0 1 FC Heidenheim | German Bundesliga |
| 7 | Thu 7 Nov | 42-0 v Heart of MidlothianHeart of Midlothian 0-2 1 FC Heidenheim | UEFA Europa Conference League Matchday 3 |
| 8 | Thu 28 Nov | 40-2 v Chelsea1 FC Heidenheim 0-2 Chelsea | UEFA Europa Conference League Matchday 4 |
| 9 | Sat 7 Dec | 42-4 v Bayern MunichBayern Munich 4-2 1 FC Heidenheim | German Bundesliga |
| 10 | Thu 12 Dec | 41-3 v İstanbul Başakşehirİstanbul Başakşehir 3-1 1 FC Heidenheim | UEFA Europa Conference League Matchday 5 |
| 11 | Sun 22 Dec | 4 0-2 v VfL BochumVfL Bochum 2-0 1 FC Heidenheim | German Bundesliga |
| 12 | Sat 11 Jan | 42-0 v 1 FC Union Berlin1 FC Heidenheim 2-0 1 FC Union Berlin | German Bundesliga |
| 13 | Thu 13 Feb | 42-1 v FC CopenhagenFC Copenhagen 1-2 1 FC Heidenheim | UEFA Europa Conference League Knockout Round |
| 14 | Sun 16 Feb | 40-2 v Mainz 051 FC Heidenheim 0-2 Mainz 05 | German Bundesliga |
| 15 | Thu 20 Feb | 41-3 v FC Copenhagen1 FC Heidenheim 1-3 FC Copenhagen | UEFA Europa Conference League Knockout Round |
| 16 | Sun 23 Feb | 42-2 v RB LeipzigRB Leipzig 2-2 1 FC Heidenheim | German Bundesliga |
| 17 | Sat 1 Mar | 40-3 v Borussia Mönchengladbach1 FC Heidenheim 0-3 Borussia Mönchengladbach | German Bundesliga |
| 18 | Sun 9 Mar | 4 1-1 v 1899 Hoffenheim1899 Hoffenheim 1-1 1 FC Heidenheim | German Bundesliga |
| 19 | Sat 29 Mar | 4 1-0 v VfL WolfsburgVfL Wolfsburg 0-1 1 FC Heidenheim | German Bundesliga |
| 20 | Sat 5 Apr | 40-1 v Bayer 04 Leverkusen1 FC Heidenheim 0-1 Bayer 04 Leverkusen | German Bundesliga |
| 21 | Sun 13 Apr | 40-3 v Eintracht FrankfurtEintracht Frankfurt 3-0 1 FC Heidenheim | German Bundesliga |
| 22 | Fri 25 Apr | 41-0 v VfB StuttgartVfB Stuttgart 0-1 1 FC Heidenheim | German Bundesliga |
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