Arsenal manager Arsene Wenger has confirmed that main centre-forward Olivier Giroud will be out until the end of the year.

The French international suffered an ankle injury against Everton on Saturday and missed tonight's match 1 - 0 win against Besiktas.

Wenger revealed that Giroud has undergone surgery on his ankle and is ruled out until December or January.

New signing Alexis Sanchez played up front in his stead today but Wenger will be under pressure to bring in another centre-forward before the end of the transfer deadline.