Russian tennis player Daria Kasatkina has announced she is gay and has a partner. In a video interview with a blogger, she also criticized the fact there are so many “taboo topics” in Russia. “For young people facing problems in public, it is very important when athletes or other well-known personalities talk about it,” she said. Same-sex relationship are generally frowned upon in Russia. Kasatkina praised Russian footballer Nadezhda Karpova for opening the door after becoming the first female Russian sportswoman to come out in June. There had been movement toward more openness at the 2018 foo…