Frida Karlsson won the Tour de Ski after a brutal finish when she went into the wall on the final climb up Alpe Cermis in Val di Fiemme.

In SVT's live reporting, many readers were of the opinion that the hill should be demolished.

Expert Mathias Fredriksson does not share that view.

- It's the 17th year you're running, it's part of the cross-country world cup and doesn't resemble anything else.

I think it has its charm and that it should remain.

He believes that Frida Karlsson went a little too hard on the hill and that it is impossible to recover when it is so steep.

- The hill is so brutal, you don't get any recovery.

Then she knows that a victory in the Tour de Ski is at stake and so she probably had a worse day.

If it had been a different competition, she would not have dug so deep, but now it was about the overall victory in the tour, which means that she digs deeper.