Bayern Munich manager Carlo Ancelotti has confirmed that midfielder Renato Sanches could leave this summer.
The Portugal international is a confirmed target for Manchester United boss Jose Mourinho.
The Blues have already made contact with the German giants to sign the player either on loan or on a permanent basis.
The 19-year-old was very close to joining the Red Devils last summer but he eventually decided to move to the German Bundesliga.
"At this time, he's training with us," Ancelotti told reporters.
"We have to make a decision.
"A move could be a possibility but there is also a chance he could stay with us for the season."