[1] Tenbrink, the manager of the club, criticized Nattkämper for giving away a penalty.
However, he could not focus on football as his job as a city official and helping his family's drink business was more important.
[1] During World War II, Nattkämper was held captive by Russian troops.
In captivity, Nattkämper played some matches for a Danzig team.
[1] Nattkämper married his wife Hildegard in 1939, and lived with her in retirement in Gladbeck until his death in 2005.