Arsenal’s attacking depth has taken another hit as Mikel Arteta confirms the long-term injury to Kai Havertz.So when will he be back?Photo by Shaun Botterill/Getty ImagesKai Havertz will not

Mikel Arteta has described Kai Havertz's hamstring injury as "an accident waiting to happen" and issued a rallying cry to his players to show "what you're made of" in his absence.

Arsenal's leading scorer, and one of the last remaining attacking options available to Mikel Arteta, has suffered a hamstring injury and is out for the rest of the season.