Kai Havertz has suffered a serious hamstring injury that threatens to sideline him for the remainder of the season, CBS Sports understands. Arsenal flew back from their warm weather training camp in Dubai on Tuesday for Havertz to undergo tests that have confirmed their worst possible fears.

Arsenal's leading scorer, and one of the last remaining attacking options available to Mikel Arteta, has reportedly suffered a hamstring injury while training with the team in Dubai.

With key attacking players injured and no reinforcements brought in during the January transfer window, Mikel Arteta faces a major challenge.The Gunners' attack is looking thin, and their title hopes could now take a serious hit.