By John Cross It was such a mismatch that you could not help but feel sorry for Sheffield United. Arsenal were ruthless, brilliant and in the mood to break records with another free-scoring victory \- their seventh straight Premier League win – to send out a powerful statement in the title race. But Blades boss Chris Wilder stood on the touchline looking horribly embarrassed as home fans had left in their thousands even before half time. Arsenal became the first English league side to win three consecutive away games by a margin of five or more goals. West Ham, Burnley and now Sheffield United…
