<prompt> Bhala ukuqhubeka kwalesi sigaba - Ngesikhathi esemncane, u-Ehrhoff waqhudelana neqembu laseJalimane labangu-18 emqhudelwaneni wokuqala we-IIHF World U18 Championships ka-1999, owawubanjelwe eFüssen naseKaufbeuren, eJalimane. Wabuyela ngonyaka olandelayo e-2000 IIHF World U18 Championships eSwitzerland, lapho iJalimane yaqeda endaweni yesikhombisa. U-Ehrhoff wabe eseqala ezingeni elingaphansi kweminyaka engama-20 kwiDivision I ye-2001 World Junior Championships. Njengoba yayibambe lo mqhudelwano emadolobheni aseFüssen naseLandsberg, iJalimane yaphuthelwa ukukhushulwa emqhudelwaneni omkhulu ngonyaka olandelayo ngokuqeda endaweni yesibili ngemuva kweFrance. U-Ehrhoff wenza ukubonakala kwakhe kwesibili ezingeni leDivision I ngo-2002 World Junior Championships  <response>: e-Austria, ehola bonke abavikeli bomqhudelwano ngamagoli amathathu namaphuzu ayishumi emidlalweni emihlanu. Wasiza iJalimane ukuthi ikhuphukele emqhudelwaneni omkhulu ngonyaka olandelayo, yahlula i-Austria ngo-7 kuya ku-1 emdlalweni wegolide. Kuyo yomibili iminyaka encintisana kulo mqhudelwano, u-Ehrhoff wathola udumo lwe-Top Defenceman. 