| Games |
Sport (Discipline) / Event |
NOC / Team |
Phase |
Unit |
Role |
As |
|
|
1968 Summer Olympics
|
Water Polo (Aquatics) |
 NED |
|
|
|
George Geurtsen |
|
|
Water Polo, Men
(Olympic)
|
|
Match #7 |
Soviet Union — West Germany |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #15 |
Hungary — Soviet Union |
Referee |
|
|
|
1972 Summer Olympics
|
Water Polo (Aquatics) |
NED |
|
|
|
George Geurtsen |
|
|
Water Polo, Men
(Olympic)
|
|
Match #6 |
Hungary — United States |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #4 |
United States — Cuba |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #6 |
Italy — Spain |
Referee |
|
|
|
1980 Summer Olympics
|
Water Polo (Aquatics) |
NED |
|
|
|
George Geurtsen |
|
|
Water Polo, Men
(Olympic)
|
|
Match #2 |
Greece — Sweden |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #5 |
Greece — Bulgaria |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #8 |
Australia — Greece |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #13 |
Romania — Greece |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #2 |
Soviet Union — Italy |
Referee |
|
|
|
Water Polo, Men
(Olympic)
|
|
Match #5 |
Soviet Union — Sweden |
Referee |
|
|