One fight still isn't enough for Matt Barnes when it comes to Derek Fisher.

The Grizzlies role player was teammates with the former Knicks head coach on the Lakers, but there is no love lost between them. Fisher is dating former "Basketball Wives: L.A." star Gloria Govan, who is the ex-wife of Barnes.

The two have already engaged in a physical altercation, but a UFC video game simulation showing Barnes beating up Fisher recently surfaced online. Barnes, who said he still wants to fight Fisher, said the simulation is true to life.

"My kids showed me that," Barnes told TMZ Sports. "That's what would really happen if it came down to it."

Barnes also said he doesn't need a cage to face his former teammate-turned-enemy.

"I'll do it to him anywhere, boss," Barnes said about fighting Fisher.

Barnes got into a fight with Fisher back in October at Govan's house. Upon learning that Fisher was romantically involved with his ex-wife and was attending a party Govan was hosting, Barnes drove there and allegedly struck him.

This isn't the first time that Barnes has publicly declared he wants a rematch against Fisher.

"I know I got to keep my mouth shut because then he'll run and tell," Barnes said about Fisher in January during the lead up to a Grizzlies-Knicks game via The New York Daily News prior to Fisher's firing. "So we're focused on playing that team [the Knicks]. And when I'm retired, him and I will cross paths again."

Fisher and Barnes' ex-wife were keeping their relationship secretive at first as Govan deleted a photo showing her and a group of people -- including the former Knicks coach -- getting ready to board a plane to celebrate her 30th birthday party.

All of the mystery went out the window when Fisher and Govan were seen publicly kissing and enjoying piggy back rides in Los Angeles last month, according to the New York Post.

Though Fisher was fired by the Knicks on Feb. 8, he's remained in the public eye due to his high-profile relationship with Govan and his deep-seeded rivalry with Barnes.

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