Ducati rider Andrea Iannone will take no part in the Grand Prix of Japan, but is scheduled to make his return in October.
The Italian suffered a vertebra fracture during practice for the San Marino Grand Prix and was forced to withdraw from the next event in Aragon.
Iannone will sit out his second successive race, but is set to make his comeback for the Australian Grand Prix at Phillip Island on October 21.
A Ducati statement read: "Andrea Iannone will not be taking part in the Grand Prix of Japan, which will be held this coming weekend at Motegi's Twin Ring circuit.
"Last week the Ducati Team's Italian rider underwent a series of checks, which showed that the excess fluid in his back injury had been almost totally absorbed and that the calcification process of the T3 vertebra, which he fractured at Misano after crashing during the first free practice session for the San Marino GP, was now well underway.
"However Iannone's doctor has advised him to continue with his rehabilitation and to wait a few more days until the fracture has completely healed, before going out onto the track once again."
Ducati have opted not to replace Iannone for the Japanese round, with Andrea Dovizioso set to be their only rider on the grid.