Willian has signed a new four-year deal at Chelsea, the club have confirmed.
Chelsea signed Willian from Shakhtar Donetsk on a five-year contract in 2013, quickly establishing himself as a key figure at Stamford Bridge.
The 27-year-old has now committed to the club until 2020, providing a boost for new coach Antonio Conte.
“I’m very happy to sign a new contract with Chelsea. It’s a dream to continue with this club and over the next four years I will try to help the team win more trophies,” said Willian.
“It’s been an amazing time for me since I joined the club three years ago, I’ve won titles and last season I was named Chelsea Player of the Year.
“I hope to be able to stay at that level during the coming seasons and achieve more success.”