Ronda Rousey's former training partner

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Ronda Rousey's former training partner, Kayla Harrison -- who's still friends with the UFC superstar -- says Ronda is surrounded by some people who don't have her best interests at heart ... and she needs to ditch them ASAP.

FYI, Kayla is a 2-time Olympic gold medalist in judo -- and trained with Ronda on a daily basis for years. They're still friends and spoke on the phone just a few weeks ago. By the way, Harrison also tells TMZ Sports she's one step closer to fighting MMA ... and got the itch while announcing at the World Series of Fighting this past weekend.

http://www.tmz.com/2017/01/04/kayla-harrison-ronda-rousey/