The two sides meet in the Champions League on Wednesday with both clubs still unbeaten in Group B.
Cazorla has been a stand-out player for the Gunners this season, but while Stevens is aware of the Spaniard's quality, he knows that there are other players that his side must watch out for.
"The way they have played their home games, they have put lots of pressure on their opponents, and that's what they will try again tomorrow," said Stevens. "But we must focus on our own game and make sure we are prepared.
"[Santi Cazorla] is a very good technical player. He has an excellent range of passes and he can control the game. He is very important for Arsenal. But it's not only Cazorla, they have many good players – you cannot focus on only one.
"I haven't been [at Arsenal] for a while. I was here 10 years ago, when Wenger was already around. It's amazing that a manager is at a club for such a long time, and he's done an amazing job. I'm happy he's still here and I'm looking forward to seeing him."
Arsenal host Schalke 04 at the Emirates Stadium on Wednesday night.