Scotland's Hogg set to miss November Tests
Stuart Hogg takes part in a rugby training session at the Anglican Church Grammar School in Brisbane on June 7, 2013
Australian interim coach Johnson believes Hogg will "probably" be ruled out of next month's internationals at home to Japan, South Africa and Australia after the 21-year-old was injured playing for club side Glasgow against Irish province Leinster three weeks ago.
"Are we counting Hoggy out of the Autumn Tests? Yeah, probably," Johnson said. "There is a chance that he might make a game but that is unlikely."
New Zealander Vern Cotter is to take over from Johnson as Scotland coach next year having made his reputation in Europe in charge of French Top 14 side Clermont.
Johnson, however, will stay with the Scottish Rugby Union but in the new position of director of rugby.