The Brazilian forward has been the target of several top teams like Barcelona and Real Madrid but has claimed that he is happy at Chelsea.
The 29-year-old has said that he could not rejoin his team yet due to visa issues.
Sarri who is clearly frustrated over the issue says that he wants to speak with Willian before further commenting on the issue.
“I want to speak to him before I answer these questions,” he said when asked if Willian had returned to training on Wednesday.
“I don’t know. I am not happy about the situation but I would like to talk to him.
“Is it strange? I think so.”
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