ABC News on Instagram: "Destanee Aiava has announced her retirement from tennis in an explosive social media post. The 25-year-old called out online trolls, while also claiming the sport had a "culture that's racist, misogynistic, homophobic and hostile to anyone who doesn't fit its mould". Aiava last played at the Australian Open, where she was knocked out with Maddison Inglis in the first round of the women's doubles. Get the news that matters to you straight from the source. Download the ABC