India, Jan. 23 -- Naomi Osaka used her victory speech to name-check one of her 500,000 followers on Twitter. "I know there's a person sitting in the ninth row named Marcus, who I stalk on Twitter, and I see your tweet so shout-out, thanks for coming, see you!" The Japanese later told reporters that "I stalk Twitter". "I know I probably shouldn't, but I just like clicking people's messages and then scrolling down and then clicking another person....