Emma Raducanu has laid bare her “brutal” experiences on the tennis tour since winning the US Open and said: “There are a lot of sharks out there.” In her first real acknowledgement of her struggles over the 21 months since she lit up New York, Raducanu admitted there are times when she wishes she had never won that title. “When I won I was extremely naïve,” Raducanu told The Sunday Times. “What I have realised in the past two years, the tour and everything that comes with it, it’s not a very...