2) Replace Chambers
Chelsea boss Thomas Tuchel will use pace on the wings, and you can guarantee that he will target Calum Chambers as a major weakness whose lack of speed can be exploited.
The 26-year-old is decent going forward but he could be turned inside and out by the likes of Pulisic. With that in mind, and considering Hector Bellerin looks intent on moving clubs, Arteta must pick either Cedric and Ainsley Maitland Niles at right-back on Sunday.