| Games |
Sport (Discipline) / Event |
NOC / Team |
Phase |
Unit |
Role |
As |
|
|
1964 Summer Olympics
|
Hockey |
 NED |
|
|
|
Guust Lathouwers |
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
India — Pakistan |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Semi-Finals |
India — Australia |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Pakistan — Japan |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
New Zealand — Great Britain |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Pakistan — Great Britain |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Pakistan — New Zealand |
Umpire 2 |
|
|
|
1968 Summer Olympics
|
Hockey |
NED |
|
|
|
Guust Lathouwers |
|
|
Hockey, Men
(Olympic)
|
|
Final Round |
Pakistan — Australia |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Semi-Finals |
Pakistan — West Germany |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
New Zealand — India |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
Belgium — East Germany |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
West Germany — East Germany |
Umpire 1 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group A |
West Germany — New Zealand |
Umpire 2 |
|
|
|
Hockey, Men
(Olympic)
|
|
Group B |
Australia — Kenya |
Umpire 1 |
|
|