Kammala wannan jumla: Jansen ya sami nasara a duniya, lokacin da aka ba shi lambar azurfa a gasar Olympics ta duniya.
2001 Gasar Zakarun Turai ta 'Yan Wasanni na U23. Shekaru hudu bayan haka, ya zo a matsayin na 5 a gasar zakarun Turai. Ya fafata a wasannin Olympics na bazara na 2004 kuma an cire shi a cikin zafin jiki.