Frida Karlsson leads the Tour de Ski by far ahead of this weekend's decider and easily advanced from today's sprint prologue in fifth.

The Swede chose to go in the first quarter-final heat, which is usually the toughest.

It looked good for a long time for Karlsson, who entered the race as second.

But in the sprint, two skaters passed and she finished first as fourth.

Time was not enough for advancement.

Maja Dahlqvist and Anna Dyvik advanced to the semi-finals after finishing first and second in their respective quarter-finals.

The competition is ongoing.

The text is updated.