Willian concedes his Chelsea career is coming to an end.
The 31-year-old has admitted his career beyond that remains uncertain as he continues to hold out for a three-year deal.
"It's a difficult situation," he said. "Chelsea offered me two years and they are not going to change.
"I don't know if it will be possible to stay. My goal is to continue working and focus on the remainder of the season, so that Chelsea can continue winning games.
"I have a clear head and I'm focused for the rest of the season that we have left. Let's see what happens."
Both Arsenal and Tottenham have been linked with the star, who will be available on a free transfer.