LOS ANGELES (AFP) - Fallen rap mogul Marion "Suge" Knight will be rooting for Floyd Mayweather from behind bars this weekend - hoping his old friend can help pay his US$10 million (S$13.2 million) bail bill, his lawyer said Thursday.

Speaking shortly after his latest court hearing, attorney Matthew Fletcher said Knight - who denies murder, attempted murder and hit-and-run charges - is counting on the unbeaten Mayweather to beat Filipino great Manny Pacquiao in Las Vegas on Saturday night.

"I think we're going to have very good luck," Fletcher told reporters. "Hopefully next week... after Floyd Mayweather wins again, I think he's going to come riding to the rescue."

Knight, who remains in custody in Los Angeles over a hit-and-run incident earlier this year that left one man dead and another seriously injured, pleaded not guilty Thursday.

Los Angeles Superior Court judge Ronald Coen again refused a request to lower his US$10 million bail.

Fletcher said Mayweather "and Suge are very close friends - have known each other for a while. Obviously he's been busy, they've both been busy, but I think we will be able to make bail."

The US boxer, who has a perfect 47-0 ring record and is the highest-paid sportsman on the planet, said this week he expects a payday of US$200 million for this fight alone.