Norway's Martin Løwstrøm Nyenget overhauled compatriot and five-times champion Johannes Høsflot Klæbo to win the World Cup cross-country ski season opener in Finland's Ruka on Friday.
The 33-year-old edged the 10 kilometre classic style race with interval starts, prevailing by 2.1 seconds from his team-mate, who held a solid lead among the earlier finishers.
AdvertisementAdvertisementAdvertisement"I felt I didn't have a particularly good finish, so I figured Martin would take it," Klæbo told Viaplay.
Austrian Mika Vermeulen was third at +4.2.
"I trained like a horse all summer," Vermeulen said.
Nyenget won just his sixth World Cup race of a long career and did it in falling snow. He also triumphed in the same Ruka race in 2023.
There were six Norwegians in the top 10 as the Nordic ski powerhouse eyes February's Winter Games in Milan/Cortina. Klæbo has the Games firmly in his sights this season as he bids to extend his tally of five Olympic golds. Nyenget has none.
AdvertisementAdvertisementAdvertisementSweden's Frida Karlsson won the women's season-opening race over the same distance in the Finnish resort.
The 2023 Tour de Ski winner was 10.5 seconds ahead of Norwegian Heidi Weng. Swede Moa Ilar finished third.
"I've had a lot of faith," Karlsson said after her 13th World Cup success. "It's nice to feel like I'm in the right way."
Lamparter triumphs
Defending World Cup champion Jessie Diggins was only fifth as she begins her final season before retirement.
"Just going out there having a lot of fun," beamed the American, who said she was "super happy" with the result despite missing the podium.
AdvertisementAdvertisementAdvertisementNorwegian cross country ski star Therese Johaug, who came out of retirement to compete last season, is not returning after becoming pregnant.
The men's Nordic combined season also started in the Ruka snow on Friday, with Austrian Johannes Lamparter winning after a normal hill jump and a 7.5km cross-country race.
The 2023 World Cup champion was 7.7 seconds ahead of German Julian Schmid, with Ilkka Herola of Finland third.
Austrian Thomas Rettenegger had led after the jumps but slipped to seventh.
German World Cup defending champion Vinzenz Geiger was missing due to a foot injury. Norwegian star Jarl Magnus Riiber has retired.
There is women's ski-jumping in Falun, Sweden, too.