 Berntsson akabudirira zvikuru muna 2003-2004, akahwina menduru kuFinland Trophy uye akakwira kusvika pachinzvimbo chechi13 kuEurope uye 21 kuWorlds. Mhedzisiro yake yakaramba ichivandudza mwaka unotevera, paakaenda mukati megumi repamusoro muEurope kekutanga mubasa rake uye aive wechi14 muNyika. Mumwaka wa2005-2006, Berntsson akapedza ari wechi11 pamitambo yake miviri yeGrand Prix, uye akarasikirwa nemutambo wenyika kuna Adrian Schultheiss. Akanga ari wechi14 pa2006 Europeans uye wechi23 pazvose zviri zviviri 2006 Winter Olympic Games uye paWorlds. 