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Chelsea allow Willian to return to Brazil to join his wife and two daughters while the squad are not training because of coronavirus.
It is a risk as Chelsea have no guarantees that the midfielder will be able to get back to the UK quickly.
There is no timeframe on how long the 31-year-old will stay in Brazil, however, he will be expected to be back in London before Chelsea return to training on April 6.
The Brazilian winger is one of four Chelsea first-team players who are at risk of being out of the contract should the season run beyond the June 30 target should it resume.