In the past, moments like Chelsea’s shorthanded goal might have sent Arsenal reeling. No longerSign up for Soccer with Jonathan Wilson hereThe gap at the top is five points. Arsenal have now played two of their three toughest away games of the season. They’ve come through a potentially extremely tricky week with reputation enhanced, despite being without one of their starting centre-backs for all three games and both for one of them. If there is any sense of disappointment, it is only that they failed to beat Chelsea, whom they have become accustomed to getting the better of, despite having a man advantage from the 38th minute on Sunday.But really there shouldn’t be any disappointment. Coming out of the international break, having conceded a late equaliser to Sunderland in their previous game, Arsenal looked potentially vulnerable. Despite having been by far the most impressive side this season, their lead over Manchester City was only four points. They were without Gabriel, who probab