Graphic: Four-year EPL efficiency

This efficiency study tracks how effective each English Premier League team has been since 2009-10.  It does so by mapping a team's offensive efficiency (measured in shots per goal scored) against their defensive resilience (measured in shots faced per goal conceded).  Data is updated to 22nd February 2012 and so includes Liverpool's recent 5-0 win over Swansea City.

The axes cross at "league average" positions, meaning the graph is divided into relatively even quadrants.

As one would expect, twinn'd Manchester clubs appear to have the greatest cumulative combination of offense and defence, Chelsea's numbers lessened by a misfiring striker and ill-fated flirtations with seductive foreign managers (their 2010 season was probably the most efficient EPL club season in recent history).

Click on the graphic to enlarge.

(c) Balanced Sports

As always, thanks to Ben Mayhew at Experimental 3-6-1 for the idea, sourced over a year ago.