Willian has declared his intent to remain at Chelsea.
But the 31-year-old says he and his family are happy staying in London.
Writing in a column for The Players' Tribune, Willian said: "I have played for Chelsea for more than six years now, and I can honestly say that I am very happy here.
"If you ask my wife if she wants to leave London, she'll say no. My daughters feel the same way. Of course, Brazil is Brazil, right? It's our home, our culture. We always feel good when we go there on holiday and see family and friends, but London is my second home.
"In fact, I recently passed a British citizenship test. Man, it was hard. It's British history in a nutshell. Some questions are so difficult that not even some of my British friends knew the answers!
"As it turned out, I failed on my first two attempts, but got it on the third. I am now a British citizen!
"So, London is where I want to stay. This is where I have my family, my church. I want my daughters to grow up here."