Tuhia he haere tonu mō tēnei wāhanga - I tīmata a Sundgren i ana akoranga wānanga i Karlstad i te ngahuru o te tau 2009 ā, i tākaro ia ki ngā kapa maha i tēnei wā. I te tau 2010-2011, i takaro ia me nga roopu motuhake e toru. Mo te Raupapa Elite, i peke ia i te roopu Karlstad i tukuna i te tau 2008 e Oskar Eriksson, ka uru atu ki te tuakana o Oskar a Markus Eriksson, me Marcus Franzén me Henric Jonsson ki te hanga Team Sundgren. I takahia hoki e ia te kapa Sweden i te 2011 Winter Universiade
, e arahi ana i te kapa o Alexander Nordgren, Axel Rosander me Johan Spiik, ahakoa i mutu te kapa i te whakataetae i te 8 o nga waahi. I peke a Sundgren i tana ake kapa, Lag Sundgren, mo Karlstad i te Swedish Men's Junior Curling Championships, i ngaro i te whakamutunga tino tata ki ona hoa kapa o mua a Oskar Eriksson, Kristian Lindström, Alexander Lindström, me Henrik Leek. I uru atu ia ki a raatau mo te 2011 World Junior Curling Championships, i toa i te mētara koura. Ahakoa ko Sundgren he whakakapi, kaore hoki i purei i tetahi keemu i te rauna-robin, i purei ia i nga keemu toa nui i te haurua whakamutunga me te whakamutunga i te wa i raru a Henrik Leek i te rangi, a he mea nui ki te wikitoria i te mētara koura.