Getty ImagesAditya GokhaleRevealed: How training ground incident sidelined Martin Odegaard and when Arsenal captain is expected to returnMartin OedegaardArsenalPremier LeagueChampions LeagueA concussion sustained on the training field has sidelined Arsenal captain Martin Odegaard.Article continues belowArticle continues belowArticle continues belowOdegaard missed three games for ArsenalSuffered from concussion during trainingExpected back after international breakArticle continues below