Arteta said: "Yes, a big performance. I thought collectively and individually we were really good against a really good team that was in great form and that was going to ask us a lot of great questions. I think we responded really well. From the first half we were really flowing and playing with a lot of courage and making things happen. Really happy today with the result, it's a great day for our supporters as well. So really happy with that.
"Great for us obviously and for the confidence and the belief that we can do it as well. That we can come to these stages against big teams and perform and win games the way we've done it tonight. Enjoy it and then it's back to work tomorrow because we have a big one on Sunday and we're going to have to prepare really well to beat them."
On Chelsea counterpart Mauricio Pochettino, he said: "All the sympathy in the world. With everything that he's been through and everything that he's been doing. He knows that. I've been on the other side as well. He's doing a great job, I think when you look at this team and analyse every second of them, they deserve to win many matches, they deserve to win against big teams. He's doing a really good job so hopefully things will turn around and be as he deserves."