The 26-year-old has been a pivotal part of Arsene Wenger's side following his €48 million arrival from Barcelona last summer, scoring 21 goals in all competitions so far this term.
"I like London, I quickly adapted. I'm very comfortable with Arsenal. In every day life, too, the city is wonderful and it helps me be a better player. I am very happy to be at Arsenal," Sanchez told beIN Sports.
"All my team-mates want to win titles. Honouring the colours of our club.
"I have started my adventure here. Now I have to keep learning from football and from my team-mates. I must also better know the club and the league. I love English football. Here we invented football, right?"
