Cassie Ventura says Diddy freaked out on her after finding out she was hooking up with Kid Cudi … threatening her with a wine opener and telling her he would release a video on Christmas showing her participating in a “freak-off.”

The singer testified in court Wednesday that Diddy found out she was seeing Kid Cudi in 2011 when he went through her phone during a freak-off.

Cassie told the jury Diddy found an email about Cassie taking her toiletry bag to Kid Cudi’s place … and he put a wine opener in his hand and threatened her.

Photographs were shown to the jury and Cassie testified they showed bruises on her back … and that her mother took the pics when she had gone home to Connecticut.

Cassie testified she told her mother it was the first time Diddy abused her, but in reality, the abuse had been ongoing.

She previously told the jury about the first time Diddy hit her … she said it happened in 2007 in a car. Cassie testified she shrugged her shoulders at Diddy after she noticed him flirting with someone else inside a restaurant and he beat her once they got in their car.

Cassie said Diddy knocked her around inside the car … and that Diddy’s chauffeur and security guard were present. She told jurors Diddy hit her on the side of the head, knocking her to the car floor.

She also testified about other instances of violence … saying she hit Diddy for calling her a name, possibly “slut or bitch.” Diddy’s defense has said the relationship had domestic violence on both sides.

Olympic gold medalist Kyle Snyder is adamant he will learn and grow from his recent run-in with cops … insisting Wednesday his May 9 arrest is not the end of his story.

The 29-year-old wrestling superstar — who was thrown in handcuffs at a Columbus, Ohio Quality Inn and Suites last week for engaging in prostitution — said in a statement on his X page he’s now leaning on his faith to get him through the difficult time he’s currently in.

“I want to thank everyone who has reached out with kindness and support,” Snyder wrote. “My focus is on my relationship with the Lord Jesus and my family.”

The comments come just a day after TMZ Sports posted body cam footage from his encounter with the Columbus Police Department. In the video, you can see law enforcement officers barged into Snyder’s room after he allegedly gave cash to an undercover cop for oral sex.

Snyder was apologetic and cooperative during his entire time in custody. He was ultimately released with a summons to appear in court on May 19.