It’s not a coincidence that Arsenal started penetrating Forest’s defence the moment a natural runner like Gyökeres came on.
It’s simple: when you’re facing a mid-block, you need your striker to stretch the opposition’s backline vertically, run the channels and play on the last line of the attack, not drop deep and suffocate the space for his teammates.
For this Arsenal team to achieve a state of equilibrium and balance in attack, Gyökeres has to be the starting CF.