Froome lost nearly a minute to his team-mate on the opening stage of the Tour when he crashed in a field five kilometres from the finish, and gave up another five seconds when he was gapped slightly on the Mur-de-Bretagne on Thursday.
Belgium's Greg Van Avermaet, of BMC, retained the overall yellow jersey, while Briton Chris Froome, of Sky, the defending champion, is one minute and two seconds off Van Avermaet's overall lead. Today the legs were good and everything was OK, " Groenewegen said.
The French rider with the Wanty-Groupe Gobert team established an advantage of more than eight minutes _ the biggest breakaway lead in this year's Tour _ before being caught by the pack with 90 kilometres to go.
"I saw the moment". I wanted to give it some time to see if the good legs would get there.
What time does the stage start? It's also a huge win for UAE Emirates after what had become a very testing season.
"I'm happy with that, " Sagan said.
Dutchman Tom Dumoulin, last year's Giro champion, suffered a puncture with five kilometres to go and ended the day 53 seconds behind the victor.
A group of five riders broke early on the 181km run from Brest to Mur-de-Bretagne and when the Quick Step team of stage contender Julian Alaphilippe suddenly accelerated on a plain, the peloton split into three with 100km remaining.More news: Put The Honey Smacks Down, CDC Warns After Salmonella Outbreak
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"I talked to everyone", Sagan said when asked how he passed the time after finishing third in the mass sprint which, with its uphill finish, suited him.
Dumoulin and his Sunweb team compounded the mechanical mishap by getting a 20-second penalty when Dumoulin stayed too close to the team auto while trying to catch the pack, thereby benefiting from its draft that pulled him along.
Van Avermaet, a support rider for Porte, has held the yellow jersey since BMC won the team time trial on Stage 3.
"The Mur de Bretagne is much harder than this", said Van Avermaet, who would not rule Sagan out of contention for the sixth stage.
This was the first summit finish of this Tour.