Michael Ballack reckons Bayern Munich have struggled since Pep Guardiola's departure
The Gunners have failed to progress past the last 16 stage of the competition in the last six seasons and have been knocked out on two separate occasions by Bayern at this point.
Bayern find themselves seven points clear at the top of the Bundesliga table under Carlo Ancelotti and they have won their last 15 home games in the Europe's elite competition.
Ballack reckons Bayern have 'lost a bit of their beauty' since Carlo Ancelotti took over
But Ballack has given Arsenal some optimism ahead of tonight's clash as he believes Bayern have struggled since the departure of Pep Guardiola.
"Players love playing in a modern stadium, with the fans close to the pitch. It's a real home advantage for Bayern," Ballack told BT Sport.
"Maybe people who are not following the Bundesliga regularly are thinking 'why are they being criticised? They are seven points ahead and look comfortable like previous years, but to be honest they don't really have concurrence.
"The other teams are struggling, not delivering. Especially Borussia Dortmund. RB Leipzig came up from the second division and are next to Bayern Munich, which is a real surprise.
Arsene Wenger's Arsenal have failed to progress past the last 16 on the last six occasions
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"There are no teams really chasing them. They came badly out of the second part of the season after Christmas and since then they've lost a bit of their beauty.
"They've been struggling. In three matches they've won all three but not by a high score.
"Actually everyone is wondering a little bit (about them) because they have been spoiled over the past years with Pep Guardiola where they really played beautiful, successful football.
"Now under Carlo Ancelotti they're still looking for the right team. It takes a bit of time. The team needs to grow. Today is a big night. Everyone expects a step up and that's what they need to do tonight."