Personally, I don't trust Graham Potter. I don't know why Chelsea management sacked an experienced coach like Thomas Tuchel. Chelsea won titles on platforms like the Champions League with a mediocre squad under Tuchel's help. I think if Tuchel was given enough time and funds he would have been able to strengthen and stabilize the Chelsea team.
I'm not underestimating Graham Potter. But Potter has not coached any big club yet. And he didn't even win a major league title. So I have considerable doubts about how much he will be able to strengthen Chelsea.
I don't blame with current Chelsea manager Thomas Tuchel have sacked after inconsistency performance at Primer League started, but have questionable about the replacement for Tuchel with manager less experience in bigger team. There are not any trophies yet in his career during become manager at several teams and I think England nationality make Graham Potter priority to be manager for Chelsea than extended Tuchel until his contract over.
Nowadays Chelsea still have chance at Champion League against with Dortmund, I think if failed make Chelsea lead to quarter final, sacking his position from Chelsea manager should questionable because he was failed at primer league and not enough reason extended him get fail again at Champion League.