Friends of hip hop star Rihanna are reported to be concerned about her quickly blossoming romance with Real Madrid soccer star Karim Benzema.

Star Magazine reports the 27-year-old Benzema has a "dark past" that makes him every bit the risk her ex-boyfriend Chris Brown ever was.

According to several media outlets, back in 2010 the French-born soccer star was indicted on the charge of having sex with an underage prostitute and stood trial for the offense four years later.

"Karim didn't deny sleeping with the woman," a source told the magazine. "He easily could have gotten three years in prison, but he lucked out." The charges were dropped after the girl refused to cooperate with prosecutors.

Meanwhile, sources add Rihanna insists she trusts her new man, even though he reportedly was publicly spotted with her rival Karrueche Tran earlier this month. Tran also happens to be one of Brown's exes. Also somewhat similar to Brown, Benzema is reported to have a child with whose mother he is still close with.

"No one would be shocked if they still hook up," a source added of Benzema and the mother of his child. "Rihanna should keep her eyes open."

Recently, Hollywood Life reported Rihanna and Benzema were under the same roof with Brown after they all bumped into one another at the same Hollywood nightspot. Witnesses claim as the "Diamonds" singer and her new man put on a display of PDA a perturbed looking Brown looked in from across the room.

Still, friends worry Benzema's past "makes Brown look like a Boy Scout," with the source adding Rihanna "is just hopeless with getting her love life in order."