Kammala jumla mai zuwa: Nerhagen ya fara zama a gasar zakarun duniya a gasar zakarun duniya a Antholz-Anterselva a shekarar 1983. Ya kuma halarci gasar zakarun duniya a
1985, 1986 da kuma 1987 ga Norway. Mafi kyawun sa na mutum a Gasar Cin Kofin Duniya ya zo ne a 1985 a Ruhpolding inda Nerhagen ya gama na 15 a tseren mutum na kilomita 20. Kyakkyawan aikinsa na ƙarshe a gasar zakarun duniya shine tagulla wanda ya zo a farkonsa a 1983, wanda kuma zai zama lambar yabo kawai a gasar zakarun duniya.