Serena Williams’ half-sister Sabrina has opened up about her decades-long struggles with mental health after her father abandoned her family.

Sabrina slammed the new film about her father’s life, in which he’s portrayed by actor Will Smith as a hero while he is a serial cheat who abandoned his first family.

Richard Williams, 79, walked out on daughter Sabrina and her siblings when she was only eight years old, telling her he was going to buy her a bicycle before never returning to the family home.

He went on to start a new family with Serena and sister Venus’s mother, his ex-wife Oracene Price, and became obsessed with his daughters becoming successful tennis stars.

In an exclusive interview with The Sun, she said: “I want to share my story, I can get the message out there about mental health.

“For me, trying to kill myself or having suicidal thoughts when I was younger, I’m not crazy, I’m healthy.

“From this article, I want people to know whether they have bipolar, depression, schizophrenia, anorexia, bulimia, gambling, whatever, that you’re not alone, you’re gonna be okay, just reach out for help”.