Loris Baz will sit out the 11th round of the 2013 World Superbike Championship at Istanbul Park after a new scan revealed possible further damage to his injured back.

The in-form Frenchman, a race winner at Silverstone, was due to start from a career-best fourth place at the Nurburgring when a high-speed accident during pre-race warm-up left him nursing a back injury.

Forced to skip the German event, Baz was expected to be back on the Kawasaki for this weekend's inaugural visit to Turkey but a final medical check revealed a previously unseen 'small area of damage' to the D4 vertebrae.

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Though this may prove to be an old injury, Baz says he won't risk competing in Turkey until further tests have been completed to confirm as such.

"My injuries are getting better and better but to make sure, to not take any risk, we have all decided it is better not to ride here. There will be a new scan on the affected area soon and if there is no change in the condition it means that the fracture is old. If there is evidence of it healing it means that it is fresh, so we will see this before I go to America for the next round.

"If I had a broken leg I would race - with the back it is too much of a risk. Even if I was trying to be careful you can still crash. Also, if I ride to be careful I could lose the good feeling I have had with the bike. When we are sure I am OK then I can restart at the same high level as I was riding at in qualifying at the N?rburgring."

Baz's late withdrawal means the Kawasaki Racing Team will run just a single bike for Tom Sykes this weekend.