Arsenal defender Laurent Koscielny admits he's happy to have seen the back of Chelsea legend Didier Drogba.

Koscielny admits the striker who impressed him most was former Chelsea ace Drogba.

"He is strong, he is good when he plays with his back to goal, a great header of the ball and good in the gaps," Koscielny said of Drogba.

"He is the first defender, running everywhere. We saw against Barcelona last season. On his own, he crashed the Barcelona ship."