The opening day of action for the latest round of the World Superbike Championship at Imola has been plunged into chaos after free practice was stopped when riders declared the circuit 'too slippery'.

The riders had ventured out onto circuit for free practice, but returned straight to the pit lane when Tom Sykes suffered an accident on his first flying lap. Only Troy Corser, Marco Simoncelli, Carlos Checa and Makoto Tamada completed a timed lap.

With other riders saying the surface was offering up no grip, the session was stopped after five minutes to give organisers time to meet and think of a solution.

Warm weather is believed to be bringing oil to the surface, most likely as a result of a World Touring Car Championship event occurring just a week earlier.

For the moment, a series spokesman says decisions are currently being taken and that action is currently delayed, rather than cancelled.