Arsenal are now strangers to letting star talents leave the club too soon, yet one Hale End prospect could make Mikel Arteta suffer in the new season. Amario Cozier-Duberry was regarded as one of Arsenal’s most exciting youngsters, with the teenage winger likened to Bukayo Saka, after tearing up the game for the Gunners at youth level for the past few years. Yet news broke this summer that the 19-year-old will be leaving Arsenal at the end of his contract, with the Gunners trying and failing to get Cozier-Duberry to renew his current deal, with the prospect of being with the first-team not eno…