Emma Raducanu’s shock US Open success isn’t only be celebrated in Britain – she is trending in China and a hot topic in Canada and Romania. The 18-year-old US Open champion was born in Toronto, Canada, to Chinese mother Dong Mei Zhai, known as Renee, and Romanian father Ion. The family moved to the UK when she was two, settling in Bromley, south-east London. In an interview before the final, Raducanu credited her Chinese background for instilling her sense of self-belief, telling Vogue: “My mum comes from a Chinese background, they have very good self-belief. It’s not necessarily about telling...