Manchester United have reportedly approached Chelsea over a move for Willian.
The Daily Mail claims Jose Mourinho is keen on bringing the Brazilian to Old Trafford next month.
United have been linked with Willian ever since the Special One took charge of United 18 months ago.
And the winger is said to be open to making the move up north after failing to hold down a place under Antonio Conte.
However, Chelsea have no intention of selling such an important player mid-way through the season unless they are offered an astronomical fee.
Conte is desperate to keep his squad intact as the Blues look to claw back Manchester City in the defence of their title.
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Monaco playmaker Thomas Lemar and Bayer Leverkusen wide-man Leon Bailey are both being looked at.
Meanwhile, United are bracing themselves for Henrikh Mkhitaryan offers.
The Armenian has featured just once since the November defeat to Chelsea.
But Mkhitaryan will not be heading to Inter Milan after a proposed swap deal involving Joao Mario was turned down.