Arsenal are gearing up for their first Champions League encounter of the season as they prepare to face Atalanta in Bergamo on Thursday night. The Gunners are currently in a good place, at least as far as their results are concerned. They bounced back from their Brighton draw by winning the North London derby. Arsenal now have 10 points from their opening four Premier League games of the season and they’ll hope they can take this momentum into the Champions League. Off the pitch, however, the Gunners have been left reeling by the news that Martin Odegaard is set for a lengthy spell on the side…