Lehmann has been told that he is no longer first choice for the Gunners.
Manchester City, Werder Bremen and Schalke are all interested in Lehmann.
Almunia said: “I don’t care what Jens is saying. If I listen to all the things other people say about me I will go crazy and I don’t want that.
“I’m not going to think about negatives. Being goalkeeper is a difficult enough position. I never had any doubts I’d keep my place.”