Oouch.

You know, I've been mulling the Trossard x Martinelli thing in my head.

I think Arteta likes Martinelli and would still start him ahead of Trossard.

Another thing I think he might do is, rotate both of them since they ordinarily have different styles of play. Use Martinelli for a more direct attack and Trossard for when he wants a diverse range of approach.

There are times I wished the other was the one on the field so, I think their position would be the most rotated upfront.