Japan's Naomi Osaka announced Monday that she has parted ways with coach Sascha Bajin, two weeks after becoming the first player from Asia to top either the men's or women's singles rankings."Hey everyone, I will no longer be working together with Sascha. I thank him for his work and wish him all the best in the future," Osaka tweeted.Bajin, who was named 2018 WTA coach of the year, responded on Twitter, "I wish you nothing but the best as well. What a ride that was. Thank you for letting me be part of this."Osaka, who won her second straight Grand Slam at the Australian Open last month, is…READ FULL ARTICLE