The Victorian could be sidelined for two months after suffering concussion, a broken cheekbone and an arm fracture in a Friday training crash.

Docker was training at Bright, Victoria when he went off the road, apparently to avoid a car.

It is understood the incident was an accident.

''Mitch has a minor fracture on his hand and his cheekbone, but neither require treatment,'' team doctor Peter Barnes said.

''He had a major concussion and for that reason he still needs to be under observation and further examination.

''I spoke to him this morning and he's already feeling significantly better.''

Robbie McEwen, a member of their team at the Santos Tour, posted a message of support on Twitter before the start of yesterday's fifth stage at Willunga.

''Doing it today for Mitch Docker and wishing him a speedy recovery,'' McEwen wrote.