By the way, I don't have data about Pochettino against Arsenal, after all this is about Chelsea against Arsenal and not about the match between Pochettino against Arsenal. Although indeed, I also aware that in football at least anything can happen. But unfortunately, I think at this moment when we say that, at the same time we also hope for a miracle for Chelsea in this match, and I think it looks like Chelsea won't be able to surprise either. Because in my view, Chelsea still needs time to create better chemistry in the team, while Arsenal have made great improvements from last season too. Therefore, at least Arsenal have started better than Chelsea, so I believe that Arsenal has a better chance of winning than Chelsea in this match.
Going by statistics and H2H it's more likely for Arsenal to win as they have a better record when compared to that of Chelsea most recently, Arsenal has really been brilliant this season and with wonderful results they have made good records as compared to that off Chelsea from the beginning of the season, so far Arsenal has done better.
Chelsea recently have recorded two wins just before the international break so it can be said they have their morale boosted currently and the can be ready to give a trial at Arsenal to test how well they have improved their ability to perform better as compared to how they started at the beginning of the season. But then Arsenal is at the peak of their confidence as they have won one of their biggest challenge in the EPL recently, they will most likely be very confident over Chelsea knowing the recent status of Chelsea, they would only have some strong resistance From Chelsea but then they are sure to get a win or draw but never a loss.