Former Chelsea coach Ray Wilkins can't see Roman Abramovich allowing Eden Hazard to leave.
Hazard is under contract until 2020 but Real Madrid are lining up a summer move.
Wilkins said on Sky Sports News: "Chelsea have got to be vying for the Champions League to keep players and encourage the best ones to join.
"Mr Abramovich will try extremely hard to keep hold of him as long as he possibly can.
"To reach those standards that I'm talking about, you have to have players of Hazard's quality - and he is truly world class."