The two FDJ Nouvelle-Aquitaine Futuroscope riders have managed to leave rivals such as Lotte Kopecky (SD Worx) behind.
The first split is only 8'' behind Longo Borghini with 25km to go.
The Belgian champ accelerates on the cobbles from Cysoing to Bourghelles (3*). The gap decreases to 20''.
Norsgaard and Cecchini are back in the bunch, 30'' behind Longo Borghini.
Cecchini doesn't pull anymore in the chase group.
The Italian rider, who finished 3rd last year in Roubaix, is now 10'' ahead of her two chasers, while the bunch trail by 25''.
They're back on the tarmac. The gap to the bunch is up to 15''.
Brand, Kopecky and Bastianelli are caught in sector 8. Elisa Longo Borghini (Trek-Segafredo) immediately attacks, with 34km to go.
Alice Barnes (Canyon//Sram Racing) is chasing behind the three leaders with 35km to go. Other riders try to bridge the 15'' gap.
The jury of commissaires ruled that the World Champion had an irregular return after her mechanical.