Today it's time for the men's mass start of 15 kilometers in the Tour de Ski.
One who will not start is the Swiss Dario Cologna.
According to Swiss television (SRF), this is because Cologna is not in the shape he wants.
He also needs to save on the trachea and gather strength for the Olympics.
The 35-year-old has previously said that this is his last season in his career.