Brazilian midfielder Gilberto admits it will be 'inevitable' that he is forced to leave Arsenal if he continues to be left out by manager Arsene Wenger.
Gilberto joined the Gunners in 2002 and, prior to this season, had been a regular in Wenger's first-team.
However, the 31-year-old has been frozen out in the current campaign following the fine form of Mathieu Flamini.
And Gilberto has revealed he has yet to receive an explanation from Wenger for his snub.
"To this day I'm waiting for an explanation as to this change. The truth is I found out about it through the newspapers," Gilberto told The Sun.
"I thought I had a good season last year and I saw no reason for what has happened. If I continue not to play, then leaving Arsenal is inevitable.
"I could not cope with another season like this one when Wenger has made me feel totally useless.
"A player must be able to smile. A sad Brazilian is no good, especially on a football pitch. Right now I really am struggling to battle on."