Deigo Marad is facing surgery after he was admitted to a hospital in Colombia.
The Argentine icon, 57, is reportedly in hospital in the Colombian city of Cali where he is undergoing tests.
Maradona is said to be seeing the same doctor who operated on his knees 17 years ago, German Ochoa.
The World-Cup winner is reportedly undergoing tests on his left knee ahead of his commitments as an analyst at this summerâ€™s World Cup in Russia.
The 57-year-old has reportedly been struggling with knee pain for four months.
Doctor Ochoa said: â€œIt is a general check-up with an emphasis on his knees. We are making evaluations and the necessary diagnostic images, resonance and laboratory tests.
â€œIn brief, we are doing everything to see the state of his knees and joints and we will base the decision (to operate) on that.â€
Local media are reporting that Maradona could be kept in the hospital for another six to eight days whilst the tests are carried out.
Maradona is currently the chairman of the board at Belarusian club Dynamo Brest.
He is due to provide analysis at this yearâ€™s World Cup for Italian television and will have his own show named â€œFrom the 10â€™s Handâ€ on Venezuelan channel TeleSur.