Injury troubles continue to be an issue for the Parkhead boss ahead of the clash with their German visitors in the second round of group-stage fixtures.
Another defeat would leave Postecoglou and his side with a really difficult task of overhauling either Leverkusen or Real Betis, who defeated the Hoops in Seville a couple of weeks ago, while a positive result would be vital in getting optimism back among the support after failure to win three of their last four league meetings.
Unfortunately, there are a number of players the Aussie is unable to call on, including summer signings Kyogo Furuhashi, Josip Juranovic and Giorgos Giakoumakis, with the latter yet to make his debut following his move from VVV-Venlo.
Captain Callum McGregor remains a significant doubt for the match, though his boss refused to rule him out of contention.
9. FC - Albian Ajeti
Fans are calling for him to be dropped, but without a recognised and experienced central striker available to step into his place it seems unlikely. Photo: Ross MacDonald - SNS Group
10. RW - Liel Abada
Little to ponder here. The Israeli has been an excellent addition thus far. Photo: Craig Williamson - SNS Group
11. LW - Jota
Another who’s been a good addition and will get the start barring any last-minute fitness issues. Photo: Ross MacDonald - SNS Group