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Pat Summitt won eight national titles in her 38 seasons coaching at Tennessee. USATSI

Former Tennessee Lady Vols basketball coach Pat Summitt, 64, is "struggling" -- and those close to her are "preparing for the worst," a source told the Knoxville News Sentinel early Sunday.

"I don't think anybody knows whether she will last a day, a month, or a year," the source said.

Summitt announced in August 2011 that she had been diagnosed with early onset dementia, Alzheimer's type. The Naismith Memorial Basketball Hall of Famer retired at the conclusion of the 2011-12 season after coaching at Tennessee for 38 years. She won 1,098 games and eight national championships.

Summitt has been living in a retirement center since January.

The court at Thompson Boling Arena -- "The Summitt" -- is named in her honor.

Summitt's family released a statement on her condition Sunday morning.

"We acknowledge the past few days have been difficult for Pat as her early onset dementia, 'Alzheimer's Type,' progresses. She is surrounded by those who mean the most to her and, during this time, we ask for prayers for Pat and her family and friends, as well as your utmost respect and privacy. Thank you."