Ange Postecoglou has been left sweating the fitness of Kyogo ahead of the clash with Hibs on Monday, according to a report.
The Japan star has been one of Celtic 's key players so far but picked up a knock in the Boxing Day victory over St Johnstone.
Postecoglou stressed at the time that it wasn't likely to be serious but question marks arose about his absence from images and footage from Celtic's training in recent days.
Kyogo wasn't pictured at Lennoxtown on Thursday and with just days before the clash with Hibs, alarm bells were ringing about his condition.
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