When the bronze was ready, Mattsson jumped up from the carpet and offered the audience in Oslo some shots of joy.
The match was actually a qualifier to play a bronze match later on Wednesday.
But Mattsson's intended opponent there, the Bulgarian Mimi Hristova, will not start after injuring herself in her semifinal.
The Swedish Wrestling Federation states that Hristova was absent from this morning's weigh-in and thus Mattsson's bronze is ready without her having to go to a bronze match.