Arsenal manager Arsene Wenger has admitted that he faces a selection headache over his starting centre-backs.

Frenchman Laurent Koscielny scored an equaliser on his first start of the season as the Gunners came from a goal down to draw 1-1 with Manchester City.

Captain Thomas Vermaelen missed the match through illness, but along with Koscielny and Per Mertesacker, Wenger is well aware that he has the difficult task of choosing two from three.

"Koscielny had a great game and stepped in very well," said Wenger.

"For me, we have three classy centre backs, it's a very difficult choice.

"I will rotate them depending on the strikers we play against."

Arsenal have only conceded two goals so far this season.