Ducati's Andrea Iannone has been advised not to return to MotoGP action at this weekend's Japanese Grand Prix.
The Italian injured his back during opening practice at Misano last month, aborting an attempted comeback at Aragon after testing his fitness in FP1.
“If I stop now my situation will improve," he said in Spain. "If I continued this weekend after Sunday my situation is worse because I'd push a lot with my back, and have the inflammation.
“I'm 100 percent focussed on my recovery and I'm 100 percent focussed to be ready for the next race.”
Last week the Italian underwent a series of checks, which showed excess fluid from the injury has been almost totally absorbed and that the calcification process of the damaged T3 vertebra was well underway.
However Iannone's doctor has advised him to continue with his rehabilitation and wait a few more days until the fracture has completely healed before going out on track.
The Red Bull Ring winner, in agreement with his team, has therefore decided not to take part in the Motegi round and instead return to action at the Australian GP from 21 to 23 October.
Ducati added that it would not replace Iannone for the Japanese event and 'will only line up on the grid at Motegi with Andrea Dovizioso' - extinguishing any thoughts that Casey Stoner might step-in.
Test rider Michele Pirro took over from Iannone at Misano and Aragon.
Iannone had been due to join this season's seven other race winners for a special photo opportunity at Motegi on Thursday.
Fellow MotoGP regulars Bradley Smith and Jack Miller, also absent for the past two races, are still expected to return this weekend.