Jimmy Coverdale for BSports Stats Insights:
Improvements here will help Arsenal, as it would it any club. As discussed by Chris Anderson and David Sally in The Numbers Game, a clean sheet was worth almost 2.5 points per match between the 2001/02 and 2010/11 seasons, so they are incredibly valuable, with clubs having to score more than two goals to surpass that value. Last season followed a very similar trend, with clean sheets proving to be almost as valuable as scoring three goals
Even conceding just one goal was again more value than scoring once, with teams averaging 1.95 points per match when allowing just one goal or keeping a clean sheet. Arsenal actually failed to win once last season on the ten occasions when they conceded two goals or more, drawing four and losing six of those games while averaging 2.54 points per match when conceding 0-1 goals.