Arsenal goalkeeper Bernd Leno is confident they can shock Manchester City on Wednesday night.
The Gunners travel to the Etihad on Wednesday night.
"We are prepared for the situation without the fans, we have worked during the break on our mindset and our leadership," the 28-year-old told Sky Sports News.
"We can surprise City because nobody has the rhythm. I'm sure we can have a good start.
"Mikel (Arteta) knows every player and he knows the manager better than anyone.
"I think Mikel will have a good game-plan and at this level we think we are a very good team."