| Europa League 1970/1971 - Appearances as Referee |  |
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 |
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| 14/10/1970 | Hibernian FC | - | Vitória Guimarães | 2:0 | - | - | - |
| 04/11/1970 | Arsenal FC | - | Sturm Graz | 2:0 | - | - | - |
| Europa League 1970/1971 - Appearances as Referee | |
|
|
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| 14/10/1970 | Hibernian FC | - | Vitória Guimarães | 2:0 | - | - | - |
| 04/11/1970 | Arsenal FC | - | Sturm Graz | 2:0 | - | - | - |
| Complete name: | Theo Boosten |
| Born: | 21/02/1929 † 14/04/1994 |
| Place of birth: |
Hoensbroek, 
Netherlands |
| Nationality: |
Netherlands |