Zlatan Ibrahimovic's agent has raised hope the Manchester United striker will get back to his best following knee surgery after revealing doctors have been stunned by the Swede's progress.
Ibrahimovic, 35, underwent an operation on damaged knee ligaments in the United States a fortnight ago and is set to miss the rest of the season and the start of the next campaign.
But Mino Raiola has suggested the forward stands a good chance of resuming his playing career once he has fully recovered.
"His knee is so strong that the doctors said they had never seen anything like it," Raiola told Swedish newspaper Expressen.
"He has a knee that it is almost impossible for a football player with a 20-year career to have. It was quite clean, there was no harm in it.
"Zlatan is so strong that the doctor wants him back after his career to research on him.
"They work in the world's best research institutions for the knees and ligaments.
"They research a lot on the subject and that is why they are better than everyone else. And the doctors want back Zlatan to do research on him.
"So after Zlatan's career, we will go back and open him up again to do research on his ligaments."
Ibrahimovic scored 28 goals in 46 games for United following his move from Paris Saint-Germain before his season was cut short last month. His long-term future is yet to be decided, with his one-year contract at Old Trafford due to expire this summer.
The former Barcelona and AC Milan striker had yet to decide whether to extend his stay at Old Trafford before suffering his injury against Anderlecht.
Sources have told ESPN FC a new one-year deal to stay at the club is still on the table, while Ibrahimovic is a target for Major League Soccer side LA Galaxy.