| Champions League 1956/1957 - Appearances as Referee |  |
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 |
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| 01/08/1956 | Borussia Dortmund | - | Spora Luxemburg | 4:3 | - | - | - |
| 21/11/1956 | Borussia Dortmund | - | Manchester United | 0:0 | - | - | - |
| Champions League 1956/1957 - Appearances as Referee | |
|
|
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| 01/08/1956 | Borussia Dortmund | - | Spora Luxemburg | 4:3 | - | - | - |
| 21/11/1956 | Borussia Dortmund | - | Manchester United | 0:0 | - | - | - |
| Complete name: | Johannes Heinrich Martens |
| Born: | 00/00/1914 † 00/11/2002 |
| Place of birth: |
Zeist, 
Netherlands |
| Residence: | Zeist |
| Nationality: |
Netherlands |