Arsenal get Jurrien Timber injury boost following knee surgery as £34m Dutch defender is already off crutchesChris BurtonGettyArsenalJ. TimberPremier LeagueArsenal have been boosted by the sight of Jurrien Timber already walking freely without crutches following his recent knee operation.Article continues belowArticle continues belowArticle continues belowArticle continues belowDefender suffered opening day setbackHas undergone successful operationHeading down long road to recovery