Singer Chris Brown is facing another assault accusation – just days after he performed at an after-party for the weekend’s much-hyped boxing match, which was also billed as the kick-off to his residency at a Las Vegas nightspot.

Las Vegas police said Brown, 25, is suspected of beating a man who was found at the Sunrise Hospital and Medical Centre at 3.42am on May 4.

The man said he was playing basketball at the Palms Casino Resort when he got into a verbal argument on the court with the singer. He claimed Brown punched him and, as he was preparing to defend himself, another person with the singer also hit him.

The man took himself to the hospital where he was treated for non-life threatening injuries and released.

Chris Brown
Chris Brown performed in Las Vegas (Robb D Cohen/Invision)

Las Vegas police said they went to the hotel after they were called to the hospital but didn’t locate Brown.

Authorities said they have given Brown the option to sign off on a misdemeanour battery citation or have the case turned over to the Clark County District Attorney’s office. As of 2pm, police said Brown has not responded.

Officer Larry Hadfield said signing off on the citation is not an admission of guilt but an acknowledgement of the accusation. Similar to accepting a traffic ticket, the accused would be given a court date in Clark County Justice Court scheduled for months from now.

Police said the investigation was continuing, but declined to address the other person with Brown who also allegedly hit the man. “We haven’t cited anybody. We have not had the opportunity,” Hatfield said.

Chris Brown
Chris Brown has a troubled past (Mario Anzuoni/AP)

The incident happened at the Palms Casino Resort, which features a basketball-themed luxury suite for 25,000 US dollars per night, officials said. The 10,000-square-foot Hardwood Suite features an indoor basketball court, locker room with a gym shower, “NBA-sized” beds and 24-hour butler, according to the hotel.

A hotel spokesman deferred all other comment to police.

On Saturday, Brown performed a sold-out show at Drai’s nightclub atop the Cromwell Hotel as after-party entertainment to the much anticipated boxing match between Floyd Mayweather and Manny Pacquiao. He also attended the fight at the MGM Grand Garden Arena.

The full-length concert was also billed as the launch to Brown’s new residency at Drai’s. His next show in the series of concerts is scheduled for July 4, according to an announcement.

Rihanna
Rihanna used to date Chris Brown ( John Shearer/Invision)

The troubled R&B singer was freed from probation for felony assault just six weeks ago. In 2009, Brown pleaded guilty to attacking his then-girlfriend, the singer Rihanna, hours before the Grammy Awards.

Brown’s legal woes have since been in the spotlight. His probation was revoked briefly, in January, for performing in Northern California without permission and in 2013 for a crash filed as a hit-and-run case. He was also charged that same year with misdemeanour assault in Washington.

In February, Canadian immigration officials also refused to allow him into the country, forcing him to cancel two shows, and British officials blocked his entry in 2010 forcing the cancellation of four performances.

Brown’s attorney and publicist could not immediately be reached for comment.