Bath first-team coach Toby Booth is wary of the threat a "very, very dangerous" Leinster will pose when they collide in Dublin on Saturday.
The West Country side, who were surprise pool winners after a late run of results, take on an Irish side struggling to find top gear over recent months.
But in European competition, Leinster are always a dangerous proposition as the former champions will be difficult to beat on home soil this week.
"They're very, very dangerous," Booth told BBC Radio Bristol.
"They've rested a lot of players from the Irish team this week, so they'll be massively bolstered.
"I think having [Irish international flanker] Sean O'Brien back and people like that – it's going be a tough contest and we know how good we've got to be."
Bath welcome back the likes of George Ford, Anthony Watson and Jonathan Joseph from international duty for Saturday's game, something which pleases Booth ahead of kick-off against a full-strength Leinster.
"We're delighted to have as healthy a squad back as you can," Booth added.
"Strength in depth is very important, both for next week and also the tough games we've got coming up.
"Everyone wants to play in finals, and as you get to the business end of the season you need as fit a squad as you can."