Ukraine's Lesia Tsurenko says she will "seek justice in court" after being subjected to "moral abuse" by the Women's Tennis Association.
The 35-year-old says she has suffered from panic attacks because of the tour's decision to "protect" an unnamed senior official after their "conscious" attack on her.
"I spoke about it openly and directly. I tried to seek protection and justice within the WTA," Tsurenko wrote.
"But in response, faced indifference and injustice, which led to a prolonged moral decline.
"Pain, fear, panic attacks, humiliation, withholding information, harassment of my team to silence me.