Steven Gerrard's side trained at Ibrox on Wednesday before heading to Belgium to face Standard Liege in their Group D fixture, kick-off 5.55pm.
Rangers beat Galatasaray in the play-off and go into the Liege game top of the Premiership table. Standard are sitting fourth in their domestic league but are just a point off the top.
Celtic host AC Milan at Celtic Park in Group H, kick-off 8.00pm. Neil Lennon's men overcame Sarajevo in the play-off and face a Milan side who are top of Serie A.
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