The former Celtic winger Ross Wallace was back at Parkhead for the Bhoys' 2-0 win against CFR Cluj.
Wallace began his career at Celtic and was a Scottish Premiership winner with the Glasgow side in 2005-06.
Now 34, the once-capped Scotland international is without a club after Fleetwood Town allowed him to leave - albeit reluctantly, according to their manager Joey Barton - at the end of the summer transfer window.
And a return to Celtic Park was on the agenda for Wallace on Thursday, as documented by the Dundee native on Instagram earlier.
The former Celtic winger Ross Wallace was among the spectators at Parkhead last night pic.twitter.com/Ur4tP7fb55— Footballer Instagram Stories (@BallerStories) October 4, 2019
Wallace has played alongside a string of past-and-present Celtic players since leaving Glasgow for Sunderland 13 years ago - including Craig Gordon, Anthony Stokes and Daryl Murphy at the Stadium of Light and Aiden McGeady, Gary Hooper and Glenn Loovens at Sheffield Wednesday.
Some Celtic fans have called for Hooper's return after the striker also became a free agent earlier this year, although the Bhoys are considerably better covered in Wallace's position.
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