But it could have been anyone, as Mikel Arteta again went to his bench to secure victory. Since the start of last season, Arsenal have scored 16 league goals via substitutes, more than any other side in the competition.
And Lacazette has scored four, more than any other player, as he has increasingly had to settle for an impact player role. But Arsenal needed a huge slice of luck from the tightest of offside calls to emerge with three points from this one.
They were outthought, outfought and outshot against a West Ham team who made a mockery of their league position. The Hammers travelled to north London on the back of a morale-boosting 3-1 win over Southampton .
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