Chelsea boss Antonio Conte hailed Willian's performance for their rout of FA Cup opponents Hull City.
Willian scored twice in the 4-0 win.
Conte said: "Willian's performance was impressive. I hope to see always this type of performance, because when Willy plays in this way it's a great joy for me, the team and the fans. He played very well and I'm very happy."
On Olivier Giroud's first goal for the club, he added: "It's important for his confidence. When you score your confidence grows. It was also important for Willy to score twice, and for Pedro to score. We need goals from our strikers."