Rangers are in Portugal to play FC Porto in Group G as they look to bounce back from a 2-1 defeat to Young Boys in Switzerland.
It's a 5.55pm kick-off for Steven Gerrard's side, who beat Feyenoord 1-0 on matchday one and host Porto in matchday four on November 7.
Celtic are at home to Lazio this evening, kick-off 8.00pm, and go into the tie top of Group E after beating CFR Cluj 2-0 last time out.
Neil Lennon's men kicked off with a 1-1 draw in Rennes and go to Rome to play Lazio again on matchday four.
Both games this evening are live on BT Sport.
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