Munster head coach Rob Penney is expecting a Perpignan backlash when they travel to the south of France this weekend.
The Irish province were resounding 36-8 victors when the sides met at Thomond Park on Sunday, but Penney believes the second half of their Heineken Cup double-header will be a much closer affair.
"They're steaming I think," said Penney. "They're alluding to a few things apparently about the refereeing and so forth.
"I think they're throwing some distractions and red herrings out there and trying to take away from the disappointment of the outcome so, to that end, they'll be trying to ambush us."
Munster are on a six-game winning streak but Penney has pinpointed areas in their set-piece and defence that require improvement ahead of their trip to the Stade Aime Giral.
"We're going into this game with a pretty positive mindset," said the New Zealander.
"There is certainly the ability in the group to go up another level and that will be the challenge because we're going to need to (this weekend)."
Conor Murray will miss the remainder of the Heineken Cup pool stages after injuring knee ligaments last weekend, with Cathal Sheridan or Duncan Williams set to deputise at scrum-half for Saturday's Pool 6 clash.
"We've got two worthy nines there and it's going to be a tough old day at the office for those guys in particular, but we're sure they'll do a great job," said Penney.
Watch Perpignan v Munster live on Sky Sports 2 from 3.40pm on Saturday