Blake was admitted to hospital suffering multiple organ failure after he was found choking having swallowed his own tongue.
His girlfriend, who found him, suggested he may have been using illegal drugs and drinking in the lead up to his collapse.Blake, who married Amy Winehouse in 2007 only to divorce two years later, has famously battled heroin addiction and is believed to have kicked his habit.
Sarah, who lives with Blake, says how the day before the collapse the recovering drug addict had met up with a friend only to return home slurring and hardly standing.
It was the next morning that it was discovered Blake was unconscious, had swallowed his own tongue and choked on his vomit during the night.Sarah, who is also mum to Blake's 18 month old daughter, says: "The doctors said they put him in a coma to help him and due to infection. I'm praying he'll survive, but I'm having to prepare myself that he may never wake up."
He is currently in an induced coma on life support in a hospital near his home in Yorkshire.
Winehouse's father, Mitch, urged her fans to pray for Fielder-Civil's recovery on Thursday, tweeting: "Terrible news about Blake this morning. Remember Amy loved him. Let's pray for his recovery."
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Julia writes for omg! UK & IE