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.
Well at this point,it's not about Pouchettino or Arteta it's about the squad both managers are managing and I think Arteta has a better and more experienced squad than Pouchettino, I'm not saying Chelsea's squad is bad, they have younger players that are talented but some of them are not very well experienced like the players at Arsenal and it would be suprising for them to win arsenal well I won't be very suprised because any thing is possible in the EPL.
For instance, weeks before the international break, we saw Wolverhampton beating Manchester City, it looked very impossible before the game kicked off but it happened so I won't be very suprised if Chelsea wins Arsenal, however in their last match they won Burnley with a very good goal margin so if they win Arsenal it may be that they've rediscovered their form under Pouchettino.