Celtic host Leipzig in Group F this evening, kick-off 8.00pm, having lost the reverse fixture 3-1 in Germany last week.
Ange Postecoglou's side go into the match on the back of a 2-1 victory at St Johnstone while Leipzig drew 1-1 with Mainz on Saturday.
Rangers continue their Group A campaign against Liverpool at Ibrox on Wednesday, kick-off 8.00pm, with Reds having won 2-0 at Anfield on matchday 3.
Giovanni van Bronckhorst's men saw off St Mirren 4-0 on Saturday while Liverpool went down 3-2 to Arsenal in Sunday's Premier League game at the Emirates.