The Latics head into the match at the Emirates with renewed confidence after defeating champions Manchester United last Wednesday. The shock win took them two points above the relegation zone after a run of three wins in their last four matches.
That run has seen Wigan win at Anfield and lose away to Chelsea in which they were only denied points by unfortunate refereeing decisions, results which their manager admitted had boosted the club.
"We are capable of getting results against anyone," Martinez told reporters.
"We proved that against Manchester United but also against Chelsea and Liverpool. Those games allowed us to break a mental barrier that we had in the past.
"We went to Anfield and won, and in my eyes we beat Chelsea, even if we didn't win the game.
"When we are at our best, and we have to be perfect, we are a competitive side no matter who the opposition is."
Midfielder Shaun Maloney scored against both Manchester United and Liverpool, despite having rarely featured for the club since his move from Celtic over the summer and his manager feels he is finally starting to feel at home at Wigan.
"There is a really strong adaptation period for certain players when they leave the Scottish Premier League and come to England," Martinez commented as he explained the Scot’s absence
"We worked really hard with him physically to reach the level we needed, then he had to find a partnership and position with our players.
"Maybe you can move from Celtic to the Premier League, but not from Celtic to Wigan. With a club fighting for the title in Scotland you get a lot of possession and the main concentration is what to do with it. It is straightforward.
"In the Premier League, physically you need to find the right level, then you have to work out what you are doing off the ball and how you are going to defend. It is not easy."
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