Willian has revealed that his dream of playing for Chelsea was behind his decision to snub a move to Tottenham in the summer of 2013.
The Brazilian was on the brink of signing for Spurs in a £30million deal from Anzhi Makhachkala after undergoing a medical and agreeing personal terms.
But after being approached by then Blues boss Jose Mourinho, Willian turned down the deal and instead moved to Stamford Bridge on a five-year contract.
He has gone on to become a fans' favourite in west London, winning the club's Player of the Year and Players' Player of the Year awards last season.
Speaking about signing for Chelsea to the club's YouTube Channel, Willian said: 'I don't know how I can explain that moment. But it was the best moment I think in my life when I signed with Chelsea because it was my dream to come here.
'When I came I am very, very happy to play for Chelsea, to win titles here, so I am very, very happy.
'Yes, it was difficult (to turn down Tottenham). But I didn't sign. When at the last moment Chelsea call me, I say I'm sorry but I go to Chelsea, that's my dream. I have to go there, I don't care. I go there.'
Willian, who has helped Chelsea to the top of the Premier League table with three goals this season, will be hoping he has done enough for a starting spot when Antonio Conte's side host West Brom on Sunday afternoon.