Olympiacos boss Pedro Martins says that his team are ready to fight for their lives in the Europa League.
The Greek side are hoping to cause an upset against the much fancied Gunners in the round of 16 clash.
The first leg takes place in Greece, which gives them a chance to get a win on the board for the second leg.
"Of course we change our strategy for the game, but our process, how we play, will never change. This is not happening," boss Martins told the Evening Standard ahead of the game on Thursday.
"I will not change how we play, even with the best teams in the world.
"If you have such good results because of the way we work, and also we have players with these kind of characteristics that suit our process, why am I going to change?
"For me it is stupid if I change because we are going to play against a big club.
"All the time my team fight to score goals, to make goals and to win games. This is the most important thing. We play good games, offensive games. This is how I define my teams."