NEW YORK Knicks coach Derek Fisher and Memphis Grizzlies forward Matt Barnes had a physical confrontation Saturday night in Los Angeles, sources said.

    Fisher had traveled to California Saturday to visit his children and was visiting the house that Barnes shared with his estranged wife, Gloria Govan, the former star of the “Basketball Wives LA” reality show, according to sources.

    Barnes, who had concluded Grizzlies training camp in Santa Barbara, arrived at the house and a physical confrontation ensued Saturday night, sources said. Barnes has known for “over a month” that Fisher is engaged in a relationship with his estranged wife, a source close to him told Yahoo Sports.

    The New York Post first reported the altercation.

    Barnes, 35, told friends that two people at the house — including a relative of his estranged wife — interceded on Fisher’s behalf, sources told Yahoo Sports.

    Barnes found Fisher, 41, in the backyard with Gloria and family members, and the altercation escalated from there, into the kitchen and then the home’s front room, one witness said.

    Fisher filed for divorce from his wife in March.

    Fisher is considering legal action for the incident, sources said.

    The Knicks, Grizzlies and NBA security have been made aware of the incident and are expected to soon start working together on a probe of Saturday night’s events.  (SD-Agencies)