Diego Maradona has undergone successful surgery to remove a blood clot on his brain.
The 60-year old Argentina legend was originally hospitalised on Monday and initially treated for anaemia and dehydration.
However, a CT scan on Tuesday revealed a subdural hematoma which required emergency surgery.
Maradona was transferred from La Plata to the Olivos Clinic in Buenos Aires where he went under the knife at midnight, Irish time on Wednesday morning.
"The surgery was performed by a selected team, several renowned neurosurgeons," the 1986 World Cup winner's doctor Leopold Luque informed the media.
"It lasted approximately one hour and 20 minutes. Diego tolerated the surgery very well, he is awake, he is very well."
He remains in intensive care.
Fans have staged a constant vigil outside the Olivos Clinic, while his fellow Argentines have sent their support Maradona's way.
Lionel Messi - who played under Maradona for Argentina - wrote on Instagram, "Diego, all the strength in the world. My family and I want to see you well as soon as possible. A hug from the heart!
Following his victory over Richard Gasquet in the Paris Masters 1000, Diego Schwartzman wrote "Fuerza Diego" on a camera lens in tribute.
Luque further updated the media on Wednesday, adding, "Diego's progress is uncomplicated.
"He is in excellent condition and slowly beginning the post-operative period."
However, the physician warned that Maradona is still some time away from being able to leave the hospital, "The recovery is day by day, so it is difficult to evaluate a time.
"The good thing is that his recovery is progressing favourably."
Maradona's daughter, Dalma, tweeted her thanks for the messages of support from around the world, "Ijust got out of the clinic I just want to thank everyone for the constant displays of love for my dad, my sister and me.
"Thank you to everyone who prayed for him!"
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