ESPNIf Serena Williams didn't know who Naomi Osaka was, she does nowESPNKEY BISCAYNE, Fla. -- Kids grow up so fast. Some of them had notable spurts during the 13 months Serena Williams was out on pregnancy and maternity leave. Among them is Naomi Osaka, who has never known a tennis landscape without the towering figure of ...Naomi Osaka Asks: What Would Serena Do?