Randy de Puniet is a doubt for the remainder of the World Superbike Championship test in Australia after suffering a large high-side on the first day of action at Phillip Island.

The former MotoGP rider, who is due to make his much anticipated WSBK debut this weekend, was showing well on the Voltcom Crescent Suzuki early on as he commanded the timesheets.

However, a high-speed tumble at turn 11 on his 27th revolution would necessitate a trip to the medical centre after falling heavily on his back. Though nothing is broken, the Frenchman admits he may be forced to rest up in order to be ready for the opening round.

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"The test started well, and I was in first position for most of this morning. My feeling with the bike was very good, we did some slight adjustments and I was confident working with new tyres to get a good feeling for the race.

"Five minutes before the end of the session I was P4 and I went out on fresh tyres with the plan to improve my lap-time, as my best was from my eighth lap on the tyre.

"On my second timed-lap I had a massive high-side at turn 11, I flew very high and came down hard on my back, with a lot of pain, it doesn't look like anything is broken but it is very swollen so I decided not to ride in the afternoon as it was impossible and we will see how it feels tomorrow morning.

"I hope to make some laps in the morning and if not, I will try again in the afternoon. I'm disappointed because it was a good start, but the most important thing is nothing is broken and I need to be ready for Friday and especially for Sunday.

"The bike is good and Alex has done the fastest time this afternoon so I think we can be confident and I hope I can be in the best condition for the race weekend."