The Austrian side defeated Borussia Dortmund and Lazio on their way to the Europa League semi-final last season and are currently top of the Hoops’ group
CELTIC are set to go up against one of Europe’s best teams in Red Bull Salzburg, according to Ralf Rangnick.
The Hoops will travel to Austria next week to take on the current Austrian Bundesliga champions.
And they will have to overcome a team that have yet to lose domestically this season.
RB Leipzig boss Rangnick was unable to stop Salzburg in the Europa League either as his team suffered a 3-2 defeat last week.
Now the 60-year-old has warned Celtic that the Austrian side, who reached the Europa League semi-finals last season, are one of the best sides in Europe.
He told Laola1: “For me, Salzburg is one of the best teams in Europe at the moment. Anyone playing them faces a difficult task.
“Last year, they not only beat Borussia Dortmund but also Lazio and some other really good teams on their way to the Europa League semi-finals.”
Salzburg finished top of their Europa League group last season before defeating Real Sociedad, Borussia Dortmund and Lazio in the knock-out stages.
They came up short in the semi-final when Marseille’s extra-time goal saw the French side progress to the final on away goals.
Marco Rose’s side did win the Austrian Bundesliga last season, losing just three games on their way to the title.