Thomas Vermaelen admits he's unhappy play left-back for Arsenal.

Laurent Koscielny and Per Mertesacker have been favoured in the heart of the back four and Vermaelen admits that is where he would prefer to be playing.

"I am fed up playing at left-back," the 26-year-old Belgian is quoted as saying by The People .

"I don't think I am good there - I want to achieve my highest level and I can't do that on the left.

"I play there to help the team but it gives me no satisfaction as I can't reach my best standard.

"I do my job but seldom feel content after matches. If the team wins I am happy, but it remains frustrating."