Celtic and Rangers are in Europa League play-off action, while Aberdeen and St Johnstone are hoping to earn a place in the group stage of the Europa Conference League.
Rangers take a 1-0 lead to Armenia for their tie with Alashkert, kick-off 4.00pm, while Celtic are 2-0 up going into the second leg of their match with AZ Alkmaar in Holland, kick-off 7.15pm.
St Johnstone earned a 1-1 draw with LASK in Austria last Thursday to set up a massive return match at McDiarmid Park, kick-off 7.00pm, while Aberdeen are bidding to overturn a 1-0 deficit against Qarabag of Azerbaijan at Pittodrie, kick-off 7.45pm.
The draw for the group stage of the Europa League takes place at 11.00am on Friday, followed by the Europa Conference League draw at 12.30pm.
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