There was a nervous long wait for the seeded runners to reach the goal inside the star-shaped fortress.
- It will take a couple of hours before I have taken.
I have been in good shape all spring but have not gotten to it before.
I have only concentrated on the sprint last month and maybe that was decisive, says von Krusenstierna who belongs to the development national team.
The OK Kåre runner from Falun made his WC debut as a 23-year-old and could not have had a better start to his WC career.
Thought it would be maybe the top 10
After the finish, he hoped that the performance would be enough for the top 10. Norman Kasper Fosser was for a while 16 seconds behind on the track but took in and was seven seconds behind the skinny Swede as second.
- It's on the border between bang and surprise.
He has the talent but has not shown it before, says SVT Sports expert Mats Troeng about von Krusenstierna's efforts.
Emil Svensk led by one second over von Krusenstierna at the first TV check, the competition's ninth (out of 24), but then ran wrong in the tunnel system inside the fortress that was built in the 18th century and became infamous during World War II as the concentration camp Theresienstadt, the German the name.