Police in Las Vegas want to quiz boxer Floyd Mayweather Jr about a domestic violence report filed by an ex-girlfriend who recanted a similar claim in 2005, police and his lawyer have said.
"She alleges he hit her. We're looking for him to get his side of the story," said Officer Barbara Morgan, a Las Vegas police spokeswoman. "We're looking to talk to him as a potential suspect."
No warrant was issued, and no charges were immediately filed.
Mayweather, 33, is undefeated as a professional fighter. He goes by the nickname "Money" and is considered one of the sport's top performers.
He has been arrested several times over the years on assault allegations. He was acquitted by a Nevada jury in July 2005 after being accused of hitting and kicking Josie Harris during an argument outside a Las Vegas nightclub.
Attorney Richard Wright, who represented Mayweather in the 2005 case, said he was talking with police about the new case, but Mayweather had not surrendered for questioning.
"We're addressing it with law enforcement," Mr Wright said. "We will co-operate with them professionally and as required by law."
Ms Morgan said Mayweather wasn't at a south-west Las Vegas house when officers responded to the domestic violence report a little after 5am on Thursday.
Ms Harris was later taken to a hospital for treatment of injuries that police officer Bill Cassell said weren't described as serious.