Donetsk have impressed with their performances against Chelsea and Juventus in the Champions League and although Willian has reiterated his commitment to helping his side progress in the competition, he has admitted that he would like to test himself in one of Europe's major leagues.
Willian said: "Chelsea and Tottenham Hotspur have made offers for me in the past. Who knows what will happen in the future. Maybe they will come back.
"At the moment all I am thinking about is Shakhtar and helping them to qualify for the next round of the Champions League.
"But I have always thought that one day I want to play for a big club in England, Spain or Italy, so it's very important for me to play so well against such an important team as Chelsea."
Willian scored twice in Shakhtar's 3-2 defeat to Chelsea at Stamford Bridge on Wednesday night.