The 32-year-old is yet to return to training with the Scottish Premiership side following an injury last season.
Brendan Rodgers has confirmed that Kris Commons is a major doubt for Celtic's Champions League qualifiers after the forward missed the start of pre-season training due to injury, the Daily Record reports.
The 32-year-old had surgery towards the end of last season, the Record reports, and appears to now be facing a race against time to be fit for mid-July when the Hoops contest their second qualifying round tie with either Lincoln Red Imps or Flora Tallinn.
And Rodgers has seemingly hinted that even if the former Derby County man was ready for the game, he may not take the risk.
"He was one of a number of players not able to train. He has not been fit to train," he told the Record.
"We worked with a group of 20 players on Monday and, obviously, some of those guys were with the medical team.
"I'm not sure if he will be ready for the qualifiers. It would be close if he was."
With the Bhoys arguably having enough strength in their squad to see off whichever side they face when they make their bow in the competition, it is surely wise for Rodgers to not risk rushing Commons back too early.
Though his form was not quite as strong last season as it has previously been, he is still one of the players available to the Northern Irishman that has the potential to create a moment of brilliance, so it would undeniably make more sense to make sure that he is back to full fitness for when they come up against much tougher opposition.