| Champions League 1998/1999 - Appearances as Referee |  |
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| 16/09/1998 | Juventus | - | Galatasaray | 2:2 | 6 | - | 1 |
| 04/11/1998 | Croatia Zagreb | - | FC Porto | 3:1 | 6 | - | - |
| 25/11/1998 | Inter | - | Real Madrid | 3:1 | 6 | - | - |
| 17/03/1999 | Olympiakos Piraeus | - | Juventus | 1:1 | 7 | - | - |
| Champions League 1998/1999 - Appearances as Referee | |
|
|
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| 16/09/1998 | Juventus | - | Galatasaray | 2:2 | 6 | - | 1 |
| 04/11/1998 | Croatia Zagreb | - | FC Porto | 3:1 | 6 | - | - |
| 25/11/1998 | Inter | - | Real Madrid | 3:1 | 6 | - | - |
| 17/03/1999 | Olympiakos Piraeus | - | Juventus | 1:1 | 7 | - | - |
| Complete name: | Dr. Markus Merk |
| Born: | 15/03/1962 |
| Place of birth: |
Kaiserslautern, 
Germany |
| Residence: | Kaiserslautern |
| Nationality: |
Germany |
| Height: | 181 cm |
| Weight: | 69 kg |
| Bundesliga (GER) appearances: | 338 |