20th July 2013 03:04
Larsson had set off at a pelt, opening a lead that grew to 20 metres by half way, but it was too much too soon, and the Swede's challenge collapsed over the last two laps.
Marusa Mismas came past her to take silver in a Slovenian senior record of 9:51.15, while Maya Rehberg left Larsson out of the medals, claiming bronze for Germany in 10:00.04, a PB for her too.
The unfortunate Larsson was left to rue her suicidal early pace and she struggled over the final barriers before jogging home a forlorne fourth in 10:12.83.
She'd set off in commanding fashion leaving the rest of the field strung out behind her. She passed the 1k point in 3:07.79, on course for Gesa-Felicitas Krause's European junor record, and the 2k mark in 6:24.02.
Kettunen kept her head, slowly moving away from Mismas in the second half of the race and eating up the ground on the fading Swede. With four to go she still trailed by 20 metres, but she had reached Larsson 800m from home.
Kettunen went past with barely a second thought and never looked back.