The Gunners will be without several key players, including Cesc Fabregas and Emmanuel Adebayor for the game.
“I think we are favourites for this game without a doubt,” the Brazilian said in the Daily Star.
“The absence of Fabregas, Adebayor, (Theo) Walcott and Eduardo is too much for Arsenal to handle at the moment. (Tomas) Rosicky is also out.
“We know that Arsenal are a dangerous team whatever side they put out, but missing all of these players will be a huge blow for them and affect their chances.
“We know that this will be a tough game with a cracking atmosphere. But we have proved ourselves in reaching the knockout stages so we have nothing to fear.
“The fact we play the second leg at home is a huge boost for us.”