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The 60-year-old has been in intensive care since undergoing a procedure to remove a subdural hematoma - an accumulation of blood between a membrane and his brain - at the Olivos clinic north of Buenos Aires last Tuesday.
"I just saw Diego, he is still sedated and resting," Matias Morla told reporters. "There is a medical team made up of more than 10 professionals that is in constant contact with everyone."
Morla said doctors had given no indication of when the former Napoli, Barcelona and Boca Juniors forward might be discharged from hospital.
"Given the state in which I just saw him, there is no chance that he will leave [this weekend]. He is resting and awaiting results," he said.
"There's a lot of uncertainty. It's very ugly. I hope he continues to recover."
On Thursday, Maradona's personal doctor, Leopoldo Luque, said the 1986 World Cup winner was suffering from confusion caused by "abstinence" after the operation. Luque did not provide details but Maradona has previously battled drug and alcohol addiction.