But with Chelsea, Newcastle and Brighton narration, I agree 100%, Chelsea is not that club anymore, this is in spite of the huge amount spent in the last and this season. A very lesser club could beat them, so I won't blink to pick Arsenal over them on Saturday.
Chelsea's two games ended with 3 points. They are in the spirit to win back home. Nothing is impossible, indeed Chelsea were not in good shape starting last season. But being overconfident with Arsenal might leave you disappointed. But maybe because Arsenal haven't lost it will make them more confident and they think Chelsea are not as difficult as Tottenham, Man City. That can be a problem during the game due to overconfidence.