Team Rockstar Motul Suzuki's Pro Open challenger Cody Cooper showed that he is the fastest contender in the 2011 Australian National Motocross Championship - but an injury has temporarily sidelined his Championship challenge.

In the first of four Pro Open motos, the recently-crowned New Zealand Motocross Champion destroyed the field, taking the win by nine-and-a-half seconds from fellow Kiwi Josh Coppins.

In the second moto, Cooper had again gapped his competition and was well ahead of the field when he crashed heavily on an uphill double. He re-joined the race and was able to finish the moto but he sustained a rib injury in the crash and was sidelined for the remainder of the day.