The Argentine starlet started his first competitive game for the Gunners in the last round, a 6-1 thrashing of League One outfit Coventry City.
Martinez thinks that facing a step up in class at the Madejski Stadium will help him prove that he is worthy of a place in the first-team squad.
He told the club's official website: "Hopefully I'll get a chance against Reading. Reading play in the Premier League so it's going to be a harder game for us [than against Coventry].
"I've been training with them for so long that you feel like you belong in the squad.
"Hopefully [the players] won't say 'Oh Emi's in goal,' but the opposite, 'Emi is playing, we have a good keeper in goal'. I want them to be confident in me."