Arsenal boss Arsene Wenger admits a Cup Double of the FA Cup and Champions League is their best hope of glory this season.
"You cannot win the championship if you lose five of your first 14 games," he said.
"But the team is young and we have come through it, and we are not the same team now as we were in August and September.
"There's a lightness back in the team, we are playing without the handbrake and we go into this Champions League game in a good state of mind, very focused, full of belief and commitment. I still believe this season can be a very successful one for us."