According to a Russian news website and 24-hour television channel, Life, the 57-year-old has died after recovering from a stroke and spending time in intensive care
Abdulmanap, the father of UFC champion Khabib Nurmagomedov, had suffered a stroke back in May after contracting coronavirus.
He underwent heart bypass surgery and was placed in an induced coma, he remained in a critical condition even after waking up.
Abdulmanap Nurmagomedov is considered as one of the best ever coaches in MMA.
UFC boss Dana White said back in May: "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."