Spain midfielder Javi Martinez expects the goals to fly in Wednesday's crunch Champions League clash against Arsenal with hosts Bayern Munich out to avenge their London defeat.

The Gunners beat Bayern 2-0 at the Emirates Stadium a fortnight ago thanks to goals from Oliver Giroud and Mesut Ozil as Pep Guadiola's Bayern suffered their only defeat of the season.

Bayern remain top of Group F while the win moved Arsenal up to third place after back-to-back defeats to Olympiakos and Dinamo Zagreb and they need to win in Munich to keep their knock-out phase hopes alive.

"We're looking forward to the game. Both teams want to play attractive football and it'll be a good match for the fans to watch," said Martinez.

"I think they will put less emphasis on defence and they won't simply stand behind the ball, both teams will try to score and I think Arsenal will attack.

"They'll try to press and get the ball, because they need the three points."

Bayern coach Pep Guardiola expects Arsenal to play "long balls to Giroud, which we didn't allow in the first leg".

"They will want to attack. This is one of the top teams in Europe," added the Spaniard.

Arsenal are unbeaten on their last two visits to Munich's Allianz Arena, but Guardiola is backing his team to make home advantage count to cement their place at the top of the group and put one foot in the knock-out stages.

"We lost in London, that can happen. Tomorrow is a new game -- with our own fans," said Guardiola. "I think we played well in London, but defeats can happen at this level."

Arsenal's German defender Per Mertesacker has said he expects Bayern to come out firing after they were "wounded" by the first leg defeat, something Munich captain Philipp Lahm has rejected and Thiago Alcantara echoed.

"We're not wounded and we have no reason to be," said the Spain international.

"We want to win the game, our standard is to win everything and to keep the ball."

With veteran wingers Franck Ribery and Arjen Robben having struggled for fitness of late, Thiago highlighted the importance of Brazil forward Douglas Costa fit and in form on Bayern's flanks.

"He is extremely important for our game. He is like a breath of fresh air, he's fast and creates goals," said Thiago after Costa set up 12 goals and scored three of his own since signing from Shakhtar Donetsk at the start of the season.