Brighton manager Graham Potter told BBC Sport: "It feels sore. Overall our performance - certainly the first half - was good. We were close to getting a second.
"In the second half, Leicester responded and we didn't play as well.
"The way we are playing looks much closer to what we want. The way the team is evolving, we have some consistency in recent months," said Arteta.
"We are still giving things to the opposition - we did it against Benfica and we did it today.
Leicester boss Brendan Rodgers: "You have seen the real spirit of the side tonight. We were a real threat going forward.
"The performance and maturity of the team was pleasing. I knew we were playing against a talented team and we had to be right on our game.
Leicester City manager Rodgers, speaking to BBC Sport: "We showed the mentality to come back. I thought some of our attacking play was very good. You are playing against a team that is so quick on the counter-attack but I felt we counter-pressed very well.
Everton boss Ancelotti: "It's been a good week. We've found consistency defensively and that was the reason for these two results.
"It keeps us with a lot of confidence, a lot of ambition and a lot of motivation.
Leicester manager Brendan Rodgers to BBC Sport on James Maddison: "He has such quality. What makes it even better is he hardly trained at all this week. He had an issue with his knee so we took him out of our midweek game.
Leicester City manager Brendan Rodgers, speaking to BBC Sport: "The mark of how you're judged as a team is how you bounce back.
"We showed confidence and it was a case of at half-time reinforcing a few things and perseverance.
Leicester manager Brendan Rodgers, speaking to Sky Sports: "It was a disappointing first half for us. We made mistakes in our defensive moments and in this league, if you give away opportunities, it can be very difficult.