I would assume that, if the answer to the title is the France international star Olivier Giroud, then Arsenal fans will still get to see our flying England forward Theo Walcott as well, probably right from the kick off, but he would be playing in one of the wide forward positions rather than the centre forward role he took up against Chelsea at Wembley last weekend.
His performance in the Charity Shield was not his best though and even though he has played well through the middle and looked dangerous recently, his off day against Chelsea will not have helped his chances of starting there against West Ham tomorrow.
On the other hand, Giroud looked more of a handful when he came on so his chances of starting will have increased. Plus the big man has a good record against the Hammers, with five goals in his five games against them. I do not think, however, that his record against tomorrow´s opponents or the two players´ performances last week will be the main factor in the manager´s decision.
I expect Wenger to cut his cloth accordingly and pick the front line that he thinks will do best. For me against West Ham that would be Giroud in the middle, where his strength and stature can occupy their big centre backs while the pace of Theo and probably the Ox can get in behind and utilise the space, the creative talents of Ozil and Cazorla and the link up play of Giroud.
Is that how you would line Arsenal up?