Police are searching for a car involved in a collision with 50 cyclists including at least one Olympian, in southern Sydney.
Fairfax says former Australian team racer Kate Nichols and Olympic cyclist Ben Kersten were involved.
Nichols was one of five Australian team members injured in a horrific road crash in Germany which killed team member Amy Gillett in 2005.
A number of riders suffered minor cuts and abrasions, one had to be taken to hospital and ambulance officers treated the others on the scene.
One of the cyclists says the driver came up close and started worrying the riders at the back, then accelerated in front of the pack and slammed on his brakes.
He said riders crashed into each other and there were broken bikes, snapped wheels and people lying all over the road.