Celtic have made their way into the Europa League after missing out on a third successive Champions League group stage appearance.
Brendan Rodgers’ side will line-up in Group B of Europe’s second-tier club tournament.
Here, Press Association Sport looks at the teams the Hoops will have to overcome to remain in Europe past Christmas.
Who are they?
Austrian champions Red Bull Salzburg came out of pot one, and they are joined by Bundesliga outfit RB Leipzig, who are also associated with the energy drink manufacturer, and Norwegian title holders Rosenborg.
How did they qualify?
Salzburg dropped into the Europa League after losing their Champions League play-off to Red Star Belgrade, despite leading 2-0 on aggregate with 25 minutes left of their home second leg. Leipzig came through three rounds of Europa League qualifiers, while Rosenborg were dumped out of the Champions League qualifiers by Celtic but went on to beat Cork and then Shkendija to take their place in the Europa group stage.
Israel striker Moanes Dabour has scored four goals in five league games for Salzburg this year and four in four in the Champions League qualifiers. Germany striker Timo Werner and Sweden midfielder Emil Forsberg will play key roles for Leipzig, while former Arsenal striker Nicklas Bendtner has been among the goals for Rosenborg this season.
When are the fixtures?
September 20: Celtic v Rosenborg (8pm)
October 4: Salzburg v Celtic (5.55pm)
October 25: Leipzig v Celtic (5.55pm)
November 8: Celtic v Leipzig (8pm)
November 29: Rosenborg v Celtic (5.55pm)
December 13: Celtic v Salzburg (8pm)