Ozil has been pilloried for his performance at Liverpool.
"The truth is every player has a little dip at some point in the season, it's very difficult to always be on top form," Cazorla told arsenal.com.
"The problem Mesut [Ozil] has is when he's on form everyone can play off him and when his form drops a bit, he is missed.
"You have to make him feel appreciated and give him the confidence he needs, he's a key player for us and let's hope that he gets back on form. We all have great confidence in him."
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