| KNVB beker 2020/2021 - Appearances as Referee |  |
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 |
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| 28/10/2020 | ADO Den Haag | - | Sparta Rotterdam | 5:3 pso | 6 | - | - |
| 20/01/2021 | FC Emmen | - | sc Heerenveen | 1:2 | - | - | - |
| 17/02/2021 | sc Heerenveen | - | Feyenoord | 4:3 | 4 | 1 | - |
| KNVB beker 2020/2021 - Appearances as Referee | |
|
|
||||
| 28/10/2020 | ADO Den Haag | - | Sparta Rotterdam | 5:3 pso | 6 | - | - |
| 20/01/2021 | FC Emmen | - | sc Heerenveen | 1:2 | - | - | - |
| 17/02/2021 | sc Heerenveen | - | Feyenoord | 4:3 | 4 | 1 | - |
| Complete name: | Siemen Mulder |
| Born: | 23/11/1983 |
| Place of birth: |
Netherlands |
| Residence: | Uithuizen |
| Nationality: |
Netherlands |