Osaka fights back from a set and a break down to progress in Miami / Gauff dominates Fernandez at Austalian Open but Osaka retires injured / Raducanu hires renowned fitness coach who worked with Sharapova and Osaka / Raducanu looking to hire Sharapova and Osaka's former fitness coach / Osaka's coach Mouratoglou on why British star Draper has 'no limits' / Sabalenka aims to keep her crown as Osaka rests up for comeback / Swiatek hires Osaka's former coach Fissette / Sabalenka extends winning steak as Osaka sets up Gauff clash / Osaka eyes long-term partnership with Serena's former coach Mouratoglou / Osaka handed US Open wild card after maternity break