The striker expects to get chances to score thanks to Bayern Munich’s attacking play and believes netting quickly will give the Gunners their best chance of progression
Mueller added: "We are not going to sit back and crowd the defence. They have nothing to lose, they can attack all the way. We have to be careful."
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Giroud, however, is upbeat regarding Arsenal’s chances and believes the Bavarians' style of football will suit his game and boost his chances of scoring.
"We need to score an early goal. In football you never know. We need to believe and stay focused," Giroud told German magazine Kicker.
"I like to play against German teams because they are attacking all the time. There I get myself more possibilities to score, but we need to correct our bad defensive behaviour as well."
Giroud is goalless in his last six outings for Arsenal, but could fancy his chances against Bayern on Wednesday after Thomas Mueller insisted the runaway Bundesliga leaders will not try to defend their way to victory.