New York, Aug 28: Former American footballer OJ Simpson`s daughter knocked her dad down in a brawl over his girlfriend, say reports.

According to the sources, Simpson`s eldest daughter Arnelle knocked him to the ground in a brawl over his girlfriend Christie Prody.

"Arnelle had a fight with Christie over Christie`s behavior. That`s what started the whole thing," New York Daily News quoted a source, as saying.

"Christie has some problems with drinking, and Arnelle got mad. OJ said "Don`t talk to her like that, and Arnelle pushed him," the source added.

The source said Arnelle, 39, called 911 in a fit of guilt after she toppled the 61-year-old, giving him a minor head injury.

According to National Enquirer, Simpson had a "cut on the back of his head, blood was coming out the side of his mouth and his lip was cut."

Arnelle was apparently furious with him dishing out money to Prody, 32, while her mom, Marguerite Whitley has to work at WalMart to make ends meet.

ANI