| 1. Round | 10/08/2019 | 1. FC Heidenheim 1846 [Youth] | - | 1. FSV Mainz 05 [Youth] | 2:6 | ||||
| 2. Round | 17/08/2019 | 1. FSV Mainz 05 [Youth] | - | SSV Ulm 1846 [Youth] | 2:0 | ||||
| 8. Round | 19/10/2019 | 1. FSV Mainz 05 [Youth] | - | Eintracht Frankfurt [Youth] | 3:1 |  |
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| 10. Round | 02/11/2019 | 1. FSV Mainz 05 [Youth] | - | FC Augsburg [Youth] | 2:0 | ||||
| 14. Round | 07/12/2019 | 1. FSV Mainz 05 [Youth] | - | 1. FC Heidenheim 1846 [Youth] | 3:0 | ||||
| 17. Round | 15/02/2020 | SpVgg Greuther Fürth [Youth] | - | 1. FSV Mainz 05 [Youth] | 2:2 | ||||
| 18. Round | 23/02/2020 | 1. FSV Mainz 05 [Youth] | - | SC Freiburg [Youth] | 1:5 | ||||
| 19. Round | 29/02/2020 | FC Ingolstadt 04 [Youth] | - | 1. FSV Mainz 05 [Youth] | 1:3 | |
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| 20. Round | 07/03/2020 | 1. FSV Mainz 05 [Youth] | - | Kickers Offenbach [Youth] | 2:1 | |
Germany