The Grand Slam star came off just minutes into the Blues’ comprehensive Guinness PRO14 victory over the west Walians, the only negative on a memorable night in the capital.
But the versatile back-rower is now undertaking a period of rehabilitation with a return to fitness in 10 to 12 weeks.
That rules Navidi out of the remainder of Cardiff Blues’ season but will not impact upon his Rugby World Cup hopes.
Cardiff Blues head coach John Mulvihill said: “Josh dislocated his elbow in a bit of friendly fire, which was unfortunate. He’s had surgery and will be right to go for the World Cup camps.
“He’ll be out for up to three months but will be able to return to running fairly early in the rehab process and maintain his conditioning under the guidance of our first class medical and strength and conditioning teams. He will be refreshed, which will be really good for him going into the camp.”
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