Specialists are urging Zlatan Ibrahimovic to ease back from his knee rehab.

The Sun says Jose Mourinho wants out-of-contract Ibra, 35, to sign a new Old Trafford deal — if he makes a full return to fitness after knee surgery in April.

Ibra has been doing his rehab at United but club medics and American specialists think he could be overdoing it.

He has taken a week off but is still on target for a December return.

But United medics and US specialists fear striker could be overdoing bid to recover from serious knee surgery. The Swede has been told to ease up to avoid any unexpected setback.