"Niki suffered an accident on the highway yesterday during training; his heavy fall meant he lost consciousness," team doctor Hubert Long confirmed in a statement.
"He's suffering from a head trauma, a broken collarbone and a back contusion and a pneumothorax requires drainage. He is still in intensive care but he can go home in two or three days. For this type of significant trauma, the period of unavailability is 10 to 12 weeks."
In a social media post the team sent their best wishes to Terpstra, saying:
There is no doubt that this mental strength that characterizes him will help him overcome this new ordeal. We hope to see him again very soon to crush the pedals as he knows how to do it. Good luck champion.
Terpstra was expected to be one of the team’s main riders at the Tour de France in September, but will now almost certainly miss the race as a he recovers from his injuries.