The Team Bahrain Victorious rider was caught up in a late crash at the five-kilometre mark of the 182.9km stage from Lorient to Pontivy.

As a result of the crash Haig suffered a fractured collarbone and concussion.

"He is conscious and okay and scans showed no head trauma," Team Bahrain Victorious doctor Piotr Kosielski said.

"He will remain in hospital overnight for observation following the team and UCI protocols."

There's been plenty of local Support for Haig and fellow countrymen Caleb Ewan who is also out of the race after breaking his collarbone in a separate crash during the final stage sprint.

"Jack was in career best form and running sixth on the general classification," Bendigo District Cycling Club posted on social media.

"We wish Jack all the best in his recovery and no doubt he will bounce back.

"Aussie compatriot, Caleb Ewan is also out with a nasty stage finish crash and we also wish him a speedy recovery."

The crash has also cast doubt on Haig's plans of competing at next month's Tokyo Olympic Games.

Competitors took to social media in criticism of the stage, including veteran Tour rider André Greipel.

"Whoever designed today's stage @LeTour should try to ride with 180 riders on a twisty 5m wide road next to each other and pushing Wachbootes to the limits," he posted on Twitter.

"Of course we riders make the race at the end but the riders also ask for an earlier time taking 5km to go which was refused."

The incident was the second crash for Haig after the TBV team leader narrowly escaped injury during the stage one crash caused by a fan holding a cardboard sign on the side of the road.

Haig was one of several riders to fall 43km from the finish in a crash after Tony Martin clipped the sign and he fell, causing a domino effect behind him.

Haig, riding for Team Bahrain Victorious, managed to get back on his bike and caught the peloton.

Meanwhile, Tim Merlier (BEL) won the third stage with a time of 4:01:28, followed by Alpecin-Fenix team-mate Jasper Philipsen (BEL).

Dutch Alpecin-Fenix rider Mathieu van der Poel (12:58:53) currently leads the general classification ahead of the 150.4km fourth stage through Brittany from Redon to Fougères.

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