5) Sanchez and Arsenal’s attack not clicking
A team that relies so much on attacking fluency, there’s been little right about Arsenal so far this season. Alexis Sanchez is the one player who can change a game in an instant when he’s at his best, but the Chilean looks tired after a long summer of playing in Copa America and being rushed back into the first-team without a real break. Mesut Ozil fades in and out of games and isn’t the kind who’s going to make a huge impact in a competitive match like this. Without Arsenal playing their best football and creating chances, there’s little hope of them doing anything of note at Stamford Bridge this weekend.