Carlos Checa will not start the second World Superbike Championship race at Phillip Island after a spectacular accident during the first encounter left him hospitalised.

2011 WSBK champion Checa, who had started from pole position, was running fourth when he out-braked himself into the turn four hairpin on lap 13, the Spaniard clipping Marco Melandri's BMW to send both riders down hard.

The impact reportedly caused Checa to lose consciousness, prompting a visit to the local hospital for further checks on a suspected head injury.

As a result of the accident, Checa will not take the start of the second race.

Checa's absence means Eugene Laverty will move up to pole position - the first time he has started a WSBK race from the head of the grid.

Following his superb run to pole position on the new Ducati 1199 R during qualifying, Checa's crash and withdrawal is another blow to the Alstare team after Ayrton Badovini was also forced to pull out because of a foot injury.