Sara took over the team as skip for the 2012 and 2013 World Junior Curling Championships respectively. In 2012, she led her team of Anna Huhta, Marina Stener and Sofia Mabergs to a 6-3 round robin finish, which put them in a four-way tie for 3rd place. The team won their tiebreak match against Japan, and their next playoff game against Russia. However, they lost in the semifinal to the Czech Republic and in the bronze medal game in a re-match with the Russians, finishing in fourth place.