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.
5. DC - Carl Starfelt
My his own admission he’s yet to find top form, but Postecoglou seems to trust him more than Stephen Welsh. Photo: Ross MacDonald - SNS Group
6. DM - Nir Bitton
Ismaila Soro struggled badly in Seville while James McCarthy has struggled at No.6 on league duty. If McGregor doesn’t make it, look for the Israeli to start. Photo: Craig Foy - SNS Group
7. MC - James McCarthy
David Turnbull and Tom Rogic haven’t been operating that well as a partnership recently and it’s time to try McCarthy in a more advanced role. Photo: Ross MacDonald - SNS Group
8. DM - David Turnbull
The midfielder’s set-piece ability would probably give him the nod over Rogic. Photo: Ross MacDonald - SNS Group