Bayern Munich captain Philipp Lahm has warned his team-mates that Arsenal are a dangerous opponent, despite their recent loss to Blackburn.
The right-back thinks Arsene Wenger's troops will take an attacking approach, and feels his colleagues will have to be wary of a backlash.
"Arsenal are dangerous, especially in attack as I believe they have problems defensively. They have very good players and we will have to be on our toes," the 29-year-old told reporters.
Meanwhile, Bayern coach Jupp Heynckes has told his troops not to become complacent when up against the Gunners, despite their tag as favourites.
"Arsenal have found their rhythm again in the last couple of weeks. They are an excellent team and play very well going forward. I'm warning about underestimating this team," he said.
"We will have to position ourselves well in defence, like we're used to. I think that we will be able to win there. But for that, we will have to bring our absolute top level of performance."
Finally, midfield duo Bastian Schweinsteiger and Thomas Mueller have claimed that only a top-rate performance will see the Bavarians triumph.
"Arsenal are an opponent who will be very unpleasant. We will have to put everything in the balance in order to gain something there," said Schweinsteiger.
Mueller added: "They are an English top-class side, you always have to be careful with those. We will go there with a lot of confidence, but we're also aware that there's a tough match ahead of us."