Boxer Floyd Mayweather has been named the highest paid sportsperson in the world over the last 12 months. Figures released by business magazine Forbes showed that the undefeated American has earned a whooping US$300m (£194m). Most of that came from his ‘super-fight’ with Manny Pacquiao, whose $160m (£103.4m) takings made him the second-highest earner. In…