Naomi Osaka Signs with Nike (April 4, 2019) Nike announced on Thursday evening, that world's No. 1 female tennis player, Naomi Osaka has signed with their team. She'll begin donning their apparel April 22 at the Stuttgart tournament. Osaka was previously wearing Adidas. Official Announcement from Nike: Two-time Grand Slam winner and current World No. 1 Naomi … [Read more...] about Naomi Osaka Signs with Nike