But Lee's comments imply that Mustafi represents a blip in Wenger's transfer activity. Although he is nowhere near good enough he is better than many centre-backs that he has signed: this is the man who gave us Silvestre, Stepanovs and Squiddly-Diddly (among other complete duffers).
I'd put Mustafi among the better ones he's treated us to: Cygan, Willie Gallas (post chav), Gabriel on a good day, Senderos......probably a touch below Vermaalen.
Yet none of those would get into any of the other top teams.