Pep Guardiola: "In the beginning, there was a lot of energy, everyone wanted the ball. It was important to get the first goal before half-time and then after that with the penalty and the sending off it was a completely different situation.
"You cannot say anything else about that but be happy about the performance of the team and everyone and the good shape.
"We have players who are so dynamic maybe they don't need many training sessions to be in top condition."
Mikel Arteta: "Everything went wrong from the first minute when Granit Xhaka got injured and we had to change the plan. Every possible accident hopefully happened today and not in the rest of the 10 games we have ahead of us."
"He has spoken in the dressing room," Arteta said on Luiz's performance. "David is someone who is very honest, straightforward, I'm sure he will talk to you guys and explain his feelings. But my opinion has changed from the moment I joined the team and it won't change because of a difficult performance tonight."