Per the Mirror:
The Brazilian playmaker was left disappointed in the summer, when Shakhtar reportedly rejected offers for him from both Chelsea - who he's set to face in the Champions League on Tuesday - and Tottenham.
And the 24-year-old revealed he would welcome an approach from either of the London rivals when the transfer window opens in January.
Willian would be a fantastic addition to Chelsea's squad and would give manager Roberto Di Matteo the depth that he needs on the wings.
His addition would also give the Blues another player who can dominate defenders on the wing with his speed and dribbling skills.
Chelsea can offer him yearly Champions League football, and even though Tottenham could certainly finish in the top four of the league table this season, earning a spot in next year's Champions League will be a difficult task for Spurs.
If Tottenham get Willian in January, they would be a much tougher club for Chelsea and England's other top teams to defeat in all competitions this season.
Tottenham already have a number of players with impressive pace, but Willian would add another dimension to the Spurs attack. His playmaking skills would really bolster the Tottenham attack, which was also improved in the summer with the additions of Clint Dempsey and others.
By signing Willian in January, Chelsea would add another talented young player that can help the squad achieve success now and well into the future, while also not allowing Tottenham to get stronger.