Bath coach Toby Booth is ready for a backlash from Leinster at the Recreation Ground after their heavy loss to Wasps in the opening round.
Leinster were stunned by the English side at the RDS while Bath's clash with Toulon was postponed due to the terror attacks in Paris.
The pair meet on Saturday though as Bath look to start their pool campaign on a positive note, but Booth is wary of a wounded Leinster.
"They've probably had the advantage of playing a game," he told the Bath Chronicle. "They'll obviously be smarting from what happened to them and there will be a reaction, so it will be interesting how we start.
"I think that's probably going to determine how this contest's going to go.
"You look at the calibre of their squad. They're obviously a very good squad.
"Irrespective of internationals, if you perform poorly you expect a reaction."
History suggests a tough outing as Leinster have won six of their seven matches against Bath, including an 18-15 victory in the 2014/15 quarter-finals. Furthermore, Bath have never won a match on home soil against Leinster in the Champions Cup, their only win against the province having come on the road.