Nordén took the silver medal in triathlon at the 2012 Summer Olympics in London. She was credited with the same time (1:59.48) as gold medalist Nicola Spirig, but was edged out in a photo finish. The Swedish Olympic Committee (NOC) appealed the result to the Court of Arbitration for Sport (CAS). The appeal was denied the day after it was filed, Nordén said she was happy with her silver medal and considered it a gold medal.