Chelsea boss Enzo Maresca spoke to Amazon Prime after his side's victory against Barcelona: "It is a good win. To be honest, it was no more than that. We knew how important this game was, but they are all important games. When you beat Barcelona, it is always nice so we are happy today.
"We dropped points at Qarabag away, then we won against Benfica and Ajax, then we lost the last one against Bayern Munich. That shows all of these games are complicated.
"Barcelona are a team that feel comfortable when they have the ball. If they don't have the ball, they don't feel comfortable so we tried to keep the ball. Even 11v11, my feeling was very good because the team was playing well.
"The defensive part is always important because you need balance. Fortunately, in the last month, we have started finishing games with clean sheets in the Premier League. It's something you need to do if you want to achieve important things."
On 18-year-old Estevao Willian scoring: "It was a huge night for him, but I think it is also a huge night for the whole club and all the fans. It is a very nice for everyone.
"We will see [if he starts against Arsenal]. For now, it's time for us to recover our energy."
On the value his side took from the Club World Cup: "Winning it was very important for my players in terms of confidence because they realised that they can win games against any team. When you're trying to build a winning mentality, you need to win games."
Goalscorer Estevao also spoke to Amazon Prime: "I don't really have any words to sum up how I'm feeling right now. It really was the perfect night. I'm just grateful to God for everything that has happened for me. Onwards and upwards from here."
On his goal: "It all happened very quickly for me, it sort of happened before I knew it. I just found some space, wiggled my way through and then scored that goal. It was such a special moment for me in my career. I hope to score many more.
"It was definitely the best moment of my career so far. I want to score many more for many years. I'm so grateful that my family were here watching me."
On his connection with the fans: "From the moment I arrived here, I felt such a connection with the fans. I'm just so happy that I could score for them and make them happy. I hope to keep making them happy and score more goals for them."