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

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.

Arsenal took a clear and collective decision not to invest last month. That decision now appears set to haunt them