The Brazilian has been a target of Jose Mourinho's for a few months now and has even been flirting with the possibility of the move actually happening.
The former Shakhtar Donetsk man could potentially join his worldwide teammate Fred who just completed his own transfer earlier this summer.
Willian still managed to provide 13 goals and 12 assists to land the Chelsea Players's Player of the Tear award but with the attacker turning 30 in August, TeamTalk claim that Chelsea are prepared to cash-in if a suitable offer arrives with the west Londoners wanting around £65m.
It could be argued that the Red Devils themselves are overstocked in their attack which is possibly why Jose already stated his happiness with his attackers.
The 29-year-old seems to have a fractious relationship with manager Antonio Conte and gave a strong hint that is the case after Chelsea won the FA Cup final.
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But a source from the morgue said when his colleagues loaded bodies into the fridges one staff member returned to check on them. However, a morgue worker checked her body later on in the mortuary fridge to discover she was still alive and still breathing.
Willian could link up with compatriot Philippe Coutinho, with the pair both starting for Tite's Brazil at the World Cup.
Do you think Willian should remain with Chelsea next season?
The Catalan side are interested in bringing the player to the Nou Camp and it is believed Chelsea would prefer to sell to the La Liga champions. It remains to be seen if they make an improved offer, although United are thought to be willing to bid more than £50m to secure the player's services in time for the new season.
The west London side will have to make do without Champions League football next term after they finished fifth last season.