I guess Graham Potter will stay a little longer after tonight's performance, but we all know he is not completely secure in the long run 
Maybe he is finally getting the team together and understanding the players better or maybe they are just luckier in the champions league than they have been in the premier league. Until the end of the game, I was not convinced that Chelsea were going to finish off well. They had many opportunities that they would have been able to score more than just two goals, luckily for them they did not concede plenty goals when they played away to Dortmund in the first leg. This victory gives Graham Potter some fresh air from the series of losses he has recorded as a coach with Chelsea, and more time for Chelsea team to be stronger before the competition becomes more serious with the last eight teams.To be fair Chelsea deserved to advance to the next round. Both games taken together Chelsea was the better team, but the circumstances under which they today scored their second goal were a bit weird. I learned a lot about the referee rules as I didn't even now some of the stuff that had to be applied today when the penalty was given.
On stream they said that this game is make or break game for Graham Potter. They are perhaps right when he now also wins a couple of games in the Premier League, but when they keep losing and also get kicked out in the next round of the Champions League, I still think he has not yet reached the dry land.
Todd Boehly was also at Stamford Bridge today and watched the game. He is probably pleased and will give Potter some room to breathe and prepare for the next games. If Chelsea can make it to the semi finals, they could even save the season partially although not starting in the Champions League next year is actually quite the nightmare for Chelsea.
Benfica showed a great performance and shouldn't be underestimated as well. Brugge is not the kind of opponent that should get them into trouble, but still winning 7-1 in both legs is strong.