Argentine legend doctor Diego Maradona said he would perform a “routine surgery” to clot the blood in his brain.
The 1986 World Cup winner, 60, entered the Ibensa clinic in Buenos Aires on Monday, suffering from anemia and dehydration.
Maradona’s personal physician, Leopoldo Locke, said the surgery would take place later on Tuesday.
“He’s clear, he understands, he agrees to intervene,” Loki told reporters.
Maradona was transferred to the Olivos Clinic in La Plata, where he will undergo surgery at 8 pm local time (23:00 GMT) by Luque, a neurosurgeon.
Maradona is now coaching Gimnasia and Esgria in the Argentine First Division.
He attended the team’s game against Patronato on Friday, his 60th birthday.
Supporters for Gimnasia y Esgrima are gathering outside the hospital, carrying messages of support for the former Argentina striker.
His former club Napoli, who helped him win two Serie A titles, tweeted of support.