UPDATE: Rohan Dennis has released a statement via Bahrain Merida:
& # 39; I am very disappointed to leave the race at this point. Of course the individual time trial of tomorrow was a big goal for me and the team, but given my current feeling it was the right decision to retire earlier today.
I wish my teammates all the best for the rest of the race and would like to thank all Tour de France fans who have cheered me at home and along the road since Brussels.
I hope to participate in this great race again in the coming seasons. "
Time trial world champion Dennis, one of the favorites for Friday's individual effort against the clock, pulled 80km from the finish of the 12th stage, the organizers said.
The Australian team, Bahrain Merida, was unable to locate him for more than an hour and he was eventually spotted with his bike parked against the team bus at the finish. The team even tweeted a message about it halfway through the race.
Dennis saw a fight with his team car before he got off his bike, but sports director Gorazd Stangelj told reporters that he & # 39; knew nothing about it & # 39 ;.
"We are also confused. I am disappointed with what happened. We actually expected a major effort from him tomorrow," Stangelj added.
"It was his decision today to stop in the feeding zone. We tried to talk to him. He said I didn't want to talk and just let the race down.
"His condition is not bad, he is good enough to perform in the Tour de France. It certainly has nothing to do with his condition. & # 39;
Asked if Dennis was difficult to work with, Slovenian Stangelj said: "I had no problems with him this season. He is a special man, let's say all champions are, he is really 100 percent when he wants something and it's hard to make everyone 100 percent happy at the same time.
"Now it's time to make things clear, to make decisions for the future," he added, although he emphasized that it was too early to say if there were & # 39; consequences & # 39; for Dennis.