A subdued and somber Arsene Wenger was left to rue Arsenal's lack of efficiency after his team lost 2-1 at home to Manchester United on Saturday in a game it dominated.

The host took advantage of a makeshift United defense to pour forward in the first half and only the excellence of visiting goalkeeper David de Gea prevented the London side from being well ahead at halftime.

But the lack of ruthlessness and the naivety which has plagued Arsenal in recent years cost it dearly at the Emirates Stadium again as a second half own goal by Kieran Gibbs and Wayne Rooney's breakaway finish gave United the points.