reports that the 57-year-old suffered a heart attack that was "brought on by Covid-19".
A close friend of the stricken trainer, Ramazan Rabadanov, told Sport Express: "He is out of a coma but still can't talk.
"He's in a serious condition. That's the only thing we know."
MCGREGOR PAYS TRIBUTE UFC icons including Conor McGregor and Dana White are among the long-list of stars to wish Abdulmanap a speedy recovery.
McGregor, who lost to Khabib in 2018, tweeted : "Praying for the recovery of Abdulmanap Nurmagomedov.
"A man responsible for more world champions, across multiple fighting disciplines, than we even know.
"A true martial genius! Very saddened upon hearing this news tonight."
White posted: "Abdulmanap Nurmagomedov is a true martial artist who lives a life of pride, honour and respect.
"He instilled those same values in his son, world champion Khabib, at an early age and was always in his corner throughout his career.
"I know how close Khabib is with his father and I'm saddened to hear about his current state.
"My thoughts are with Abdulmanap and the Nurmagomedov family as he continues to fight."
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