Former 18-time Grand Slam champion Chris Evert has told Naomi Osaka that she is rooting for her and urged her to continue developing thick skin and getting mentally stronger. After Osaka was brought to tears by a heckler in Indian Wells, Evert advised Osaka to be a sensitive person around those close to her but to have a thick skin when she is competing and dealing with heckler. Evert, a former world No. 1, acknowledged that Osaka is a great champion but also a very kind and genuine person. “We are all fans of Naomi Osaka and we have seen the h …