Defending champion Chris Froome was nursing a wrist injury as the Tour de France resumed in northern France on Tuesday following an early crash on stage four.
The Briton had been hoping for an incident-free day ahead of Wednesday's cobbled route from Ypres to Arenberg Porte du Hinaut, which could shake up the general classification, but fell six kilometres into the 163.5km stage from Le Touquet-Paris-Plage to Lille.
The Team Sky leader, who began the day in fifth overall after three stages in the UK, suffered a grazed left hip and torn cycling shorts after a touch of wheels in the peloton.
He swiftly found his feet and was taken back to the main group by team-mates Bernhard Eisel and David Lopez, with superficial wounds and a sore wrist.
Froome crashed during June's Criterium du Dauphine, damaging his left side, but it was too early to determine the full impact of the latest blow to the same side.
He will be assessed in full at the conclusion of the day's stage after this afternoon visiting the official race vehicle's medical car for attention from a doctor for running repairs.
His wrist was the main concern and team-mate Vasili Kiryienka was given a splint from the team car for Froome's use.
Race doctor Florence Pommerie told France Televisions: "They're essentially a few scratches, but that's got to hurt nevertheless.
"He also hurt his wrist, but we'll have to wait and see how it goes."
Team Sky sports director Nicolas Portal insisted Froome was fine.
Portal said: "We were scared out of our wits, like everyone else, but after talking with him, everything seems okay.
"He hit the tarmac hard, but everything's all right. We gave him a splint and, of course, we're taking things extra carefully now.
"I'm not superstitious, but this is one fall we could've done without."