| 3. Liga 2020/2021 - Appearances as Referee |  |
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| 12/04/2021 | SV Meppen | - | SV Wehen Wiesbaden | 0:3 | 1 | - | - |
| 3. Liga 2020/2021 - Appearances as Referee | |
|
|
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| 12/04/2021 | SV Meppen | - | SV Wehen Wiesbaden | 0:3 | 1 | - | - |
| Complete name: | Guido Winkmann |
| Born: | 27/11/1973 |
| Place of birth: |
Germany |
| Residence: | Kerken |
| Nationality: |
Germany |
| Profession: | Polizeibeamter |
| Club: | SV Nütterden |
| Height: | 180 cm |
| Weight: | 71 kg |
| Bundesliga (GER) appearances: | 161 |