The 20-year-old Boels Dolmans rider came out on top in a four-way sprint to the line, holding off Italy’s Elena Cecchini of Canyon-SRAM to win the 152 kilometres race in 3 hours 51min 17sec. 

The Netherlands' Lucinda Brand of Team Sunweb Women was third, while Italy’s Elisa Longo-Borghini, a late entry for Wiggle High5, just missed out on a podium place a week after winning the Strade Bianche classic in Italian city Siena.

Dideriksen's former team-mate Ellen van Dijk of The Netherlands established a 30-second advantage with 30km remaining, but the eventual front-four successfully counter-attacked to ride clear to the finish.

"It was hard," Dideriksen said.

"We were always on 10 to 15 seconds the entire time.

"We didn’t know if it would come back.

"I tried to keep the gap but save some energy for the sprint."

Dideriksen’s team-mate and defending champion Chantal Blaak of The Netherlands finished nine seconds back in ninth place. 

Action continued today at the Paris-Nice, a UCI World Tour event, as Australia's Richie Porte won the 177-kilometre penultimate stage with a time of 5:01:35.

The BMC Racing rider clinched the leg from Nice to Col de la Couillole by a margin of 21 seconds ahead of two-time Tour de France winner Alberto Contador of Spain.

Ireland's Dan Martin was 32 seconds off the pace in third. 

Fourth place went to Colombia's Sergio Henao, who has subsequently moved to the top of the general classification standings with an overall time of 27:01:15.

Martin is his closest challenger, 30 seconds back, while Contador is 31 seconds behind in third. 

Tomorrow's eighth and final stage is due to be 115.5km, with both the start and finish in Nice. 

Elsewhere, Nairo Quintana won stage four of the Tirreno–Adriatico.

The Colombian triumphed on a 187km route from Montalto di Castro to Monte Terminillo.