Slovan Bratislava coach Boris Kitka insists they will come up against the 'best clubs in the world' in the Champions League starting with a game against Celtic next week.
The Hoops kick off the new-look tournament with a match against the Slovakian champions in Glasgow on Wednesday.
Slovan Bratislava warmed up for the game with a comfortable 5-0 win in the Slovakian Cup this week against AC Nitra.
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Veteran boss Vladimir Weiss was laid low with the flu and missed the game.
But his No.2 Kitka underlined just what he expects when they play at Parkhead in the Champions League.
He said: "We have an extremely challenging schedule. We are in the Champions League against some of the world's best clubs and we start against Celtic.
"We have Dunajska Streda this weekend and it is very important we treat our league matches with the same intensity as the Champions League matches.
"I think it is important to be realistic about this. For many of us, it will be our first time at such a high level.
"The team did a professional job in the Cup because we were dominant from the very first minute and should have scored more goals. Hopefully, it will help our manager's recovery."
