It's matchday two of the Champions League this midweek, with Wednesday evening fixtures for both Celtic and Rangers.
Celtic are in Warsaw to face Shakhtar Donetsk, who began their Group F campaign with a 4-1 win over Leipzig in Germany last week. Kick-off is 5.45pm.
In a Group A fixture delayed from Tuesday, Rangers take on Napoli at Ibrox, kick-off 8.00pm, with the Serie A side having seen off Liverpool 4-1 on matchday 1.