Brooke Mueller Plays Tennis After Link To Matthew Perry Investigation Revealed

COURT APPEARANCE

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Brooke Mueller hit the tennis court with serious energy this week ... after a tough time recently, with her name tangled up in Matthew Perry 's ketamine death investigation.

The actress was rocking full red tennis gear in Malibu, looking like a pro and soaking up the sunshine, showing off her skills on the court.

Brooke was all smiles, serving up aces and sunshine -- her sighting coming after we revealed she was in a rehab facility at the same time with Matthew Perry and Jasveen Sangha -- AKA "Ketamine Queen" -- the woman who allegedly sold the fatal dose to the "Friends" star.

Sangha’s among 5 charged in connection with Perry's death, including 2 doctors.

As we reported, when Brooke was in rehab back in March, authorities swooped in with a search warrant and grabbed her computer and phone, all part of the investigation into Perry’s death.

BROOKE THROUGH THE YEARS

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She cooperated with the authorities, which led to the indictment of her best friend Erik Fleming -- he's already cut a plea deal.

REMEMBERING MATTHEW PERRY

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TMZ Studios is dropping a bombshell doc, "Matthew Perry and the Secret Celebrity Drug Ring," on Fox Monday at 9 PM ET. The exposé peels back the curtain on how the rich and famous, along with their entourages, can get their hands on drugs from doctors, pharmacies, enablers ... even rehab centers.