The Gunners beat Roma 1-0 in the first leg at Emirates Stadium last week.
He said: “I think Roma have the necessary resources to knock Arsenal out.
“We will welcome some important players back for the second leg at the Stadio Olimpico.
“The key to success is to focus on playing our football and we must keep believing that we can get through.
“On a personal level, playing and training with extraordinary players like Francesco Totti, Mirko Vucinic and Philippe Mexes is fantastic.
“I never dreamed I would play for Roma. If I’m living a dream I just hope that I don’t wake up!”
