The Gunners lost 2-0 at home against Aston Villa in the Premier League on Sunday.
Despite the setback, which puts Manchester City at the top of the table, Arteta was bullish on his team's chances.
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He stated post-game: I don't know but when you look at the schedule of the games that we have to play every three days, it's crazy.
So this can happen to any team, it has happened in the past and we cannot control that at all.
We can control how we are going to be now, prepare from tomorrow to give ourselves the best chance to go to Munich with big belief and win the game to go into the semi-finals."