Inside Sport newsletter: Get an expert guide to the biggest moments shaping the world of sport Get our free Inside Sport newsletter Get our free Inside Sport newsletter Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice Emma Raducanu insisted parting company with Andrew Richardson following her US Open triumph was not a mistake despite opting to rehire him. Richardson coached Raducanu to the US Open title five years ago but