Japan’s Naomi Osaka reached her first Miami Open final on Thursday after overcoming Tokyo Olympic gold medalist Belinda Bencic of Switzerland 4-6, 6-3, 6-4. Four-time grand-slam champion Osaka, currently 77th in the WTA rankings, dropped her first set of the tournament but bounced back to beat her 28th-ranked rival for the second time in five attempts. It marked a special occasion for the 24-year-old Osaka, who used to train in the southern Florida city and was cheered on by a supportive “home” crowd that included her mother Tamaki. “I just wanted to thank everyone, the atmosphere was really g…