By Amy Tennery (Reuters) – Four-times major winner Naomi Osaka is breaking away from IMG to launch her own sports agency with longtime agent Stuart Duguid. Duguid and Osaka began discussing the venture at the Tokyo Olympics last year, Duguid told Reuters via email, adding that the firm, called Evolve, will operate as a “small boutique and bespoke agency.” “We were discussing the business models of some of her mentors like Kobe (Bryant) and Lebron (James). We thought – why has no transcendent female athlete done that yet,” he said. “It’s athlete driven and focused on big picture brand building …