Matt Barnes may claim to have gotten "past the crush stage" with Rihanna, but apparently he doesn't want anyone doing that with his estranged wife -- not even Knicks coach Derek Fisher.

Fisher was at the Los Angeles home of Barnes' estranged wife, Gloria Govan, who stars on "Basketball Wives: LA," and when the Grizzlies role player got word of it, he stormed in and attacked the Knicks coach, according to the New York Post. Fisher and Barnes were teammates on the Lakers, but their bond appears to be broken.

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The Knicks bench boss has reportedly been dating Govan for "a few months," and he filed for divorce from his wife of 10 years, Candace, in March. The Post cites sources that claim Barnes drove 95 miles to Los Angeles to confront Fisher and he physically attacked him.

"Derek was in Gloria's back yard with about 10 people having a bonfire on ​​Saturday," a source told the Post. "Derek's separated from his wife and there's a relationship with [Gloria]."

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The source added that Barnes was at Grizzlies camp in Santa Barbara, Calif. but "went crazy" after hearing Fisher was at his house. The tipster continued that Barnes immediately got into his car and "went to the house and went after Fisher." The source also noted that Fisher won't press charges and that he only had a few scratches as a result of the melee.

Govan plans to put a restraining order on Barnes, who was arrested in 2010 on domestic disturbance charges and again in 2012 on a misdemeanor traffic warrant, according to the Post. The cops arrived on the scene after Fisher left and he missed Knicks practice on Monday for what the team dubbed as "personal reasons."

Barnes' personal life seems a little crazy, as he insists that he and Rihanna got to a stage where they were more than friends, while the R&B star said she has never met the basketball player in her life.

The Knicks and Grizzlies game on Jan. 16 just got a whole lot more interesting.

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