This week on Defending in Numbers our host Rob Armstrong is joined in the studio by George Elek and a pod debutant, former professional keeper David Preece. They applaud the goal-scoring antics of Benevento keeper Alberto Brignoli and admire David de Gea's performance at Arsenal, asking what the game at the Emirates can tell us about xG's value as a stat. We also look ahead to the forthcoming transfer window. Yes, it really is almost that time of year again.