It was the second victory in the race for Groenewegen, who also won a sprint in last year's concluding stage on the Champs-Elysees in Paris. "It was good to finish second back then but this time I was coming for victory", Martin 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.
"The race went so hard on the first part of the climb, I saw everyone was on the limit and there were no teammates left, so why not have a try?" I didn't think it was going to happen, but the legs just were there.
"It's never good to lose time. I thought the corner was closer to the finish than it really was".
"It makes this Tour de France a success for us already, and anything else is a bonus".More news: Trump claims victory over Nato allies to hike spending on defence
"I don't know if he did it on objective or if he wanted to drop everybody but I have to say thanks", Sagan said.
"I hit the back wheel of Bardet when there was the movement in the peloton and I couldn't avoid it", the Dutch rider said.
The likes of Vincenzo Nibali, Richie Porte, Geraint Thomas, Nairo Quintana, Mikel Landa and even Peter Sagan were part of the group - although defending champion Chris Froome (Team Sky) found himself on the other side of a slight split to concede five seconds to many of his GC rivals, while Colombian Rigoberto Uran (EF Education First-Drapac) was a further three seconds in arrears.
Dutchman Tom Dumoulin, the 2017 Giro d'Italia champion, suffered a puncture with five kilometres to go and ended the day 53 seconds behind the victor.
"I had good sensations but nothing outstanding, I was at my maximum".More news: Brit exposed to deadly nerve agent regains consciousness
It would have put him level with Froome overall, but the Team Sunweb rider was later handed a 20 second penalty for drifting behind the team cars.
"I tried to win the stage but it was pretty complicated", Van Avermaet said.
Greg Van Avermaet retains the yellow jersey and remains first in the general classification for the fourth consecutive stage.
The pack rides during the seventh stage of the Tour de France cycling race over 231 kilometers (143.5 miles) with start in Fougeres and finish in Chartres, France, France, Friday, July 13, 2018.
The Dutch cyclist, who rides for Team Lotto NL-Jumbo, clocked almost six hours over the 231-kilometer (143.5-mile) trek from Fougeres, home to the best-preserved and largest medieval fortress in Europe, to Chartres, site of a vast cathedral known for its stained-glass windows.More news: Deputy AG Rod Rosenstein to make ‘law enforcement announcement’